正確相序 的英文怎麼說

中文拼音 [zhēngquèxiāng]
正確相序 英文
correct phase sequence
  • : 正名詞(正月) the first month of the lunar year; the first moon
  • : 形容詞1. (符合事實; 真實) true; reliable; authentic 2. (堅固; 堅定) firm
  • : 相Ⅰ名詞1 (相貌; 外貌) looks; appearance 2 (坐、立等的姿態) bearing; posture 3 [物理學] (相位...
  • 正確 : exactness; correct; right; proper; rightness; rectitude; validity
  1. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線(等傾角螺旋線)槽形,可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大,所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點,提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜,手工編制數控加工程難度大.為了解決數控加工程的編制問題,研究了斜航線的數學模型,開發了自動編程軟體系統.使用該系統,可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程.燃燒室收斂-擴張段的母線斜率變化大,加工難度大,是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗,研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術,已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用,驗證了所開發的斜航線冷卻通道加工方法的性和可行性.這些加工技術的研製成功,對其他似類型零件的加工亦具有參考意義
  2. Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources

    基於以上考慮,論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討:全面回顧了「可持續發展」概念的由來與演變,對國內外「可持續發展」的研究現狀進行了述評,並對「可持續發展」概念的科學內涵進行了深入探討;對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述,對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解;全面闡述了地下水資源變值系統理論的內容和意義,並與傳統的地下水資源計算評價方法進行了對比分析,結合實例具體說明了方法的應用;深入分析了地下水資源預測預報工作的極端重要性和復雜性,對傳統的地下水資源動態預測方法進行了全面的評述,指出了各類預測預報方法的特點及適用條件,對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍,以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹,並應用於地下水動態過程線的分析,採用時間列中的b ? j法,蒙特卡羅方法,與地下水資源變值系統理論結合,探討了地下水動態資料分析和地下水資源預測預報的新思路;綜合分析了現今各類地下水管理模型的特點及缺陷,將數學規劃、數理統計、隨機過程等與地下水變值系統理論結合進行地表水地下水或多水源的聯合優化調度,使模型更準、更實用;對保證地下水資源可持續開發的內部條件和外部條件進行了分析,內部河海人學博卜學位論文前言、摘要、目錄條件主要是的資源觀,科學的資源計算與評價方法,可靠的資源預測預報技術,可操作的資源管理措施,外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。
  3. It ' s a common misnomer to call the language " assembler ", so start out on the right foot by calling the language by its proper name

    把這門語言叫做「匯編程」這種用詞不當當普遍,因此,請從這門語言的稱呼作為起點出發。
  4. The important meaning in which this direction studied has lain in establishing the connection between the material science of concrete and civil engineering, analyse the strength in terms of material microcosmic or the mesoscopic, have important meaning to understanding, know the essential law of the strength of concrete. this text divides six chapters altogether. chapter one reviewed the pore structure in nowadays domestic and international research current situation, including the concrete examines research, research of the pore structure model and the research current situations of pore structure and strength relation of the pore method, have introduced some most important achievements of structure research of pore ; chapter two narrated much yardstick of the material mesoscopic structure of concrete and principle of examining pore technology of material of concrete, and the commonly used sign parameter in discussedding the pore and material pore of quito of cement and analyse, have explained that the influence factor of mip to the result of study of pore, has pointed out the limitation in mip in the pore structure ; analyse porosity and strength relation development course of model emphatically, and has carried on comparative analysis to the existing model, has pointed out the weak point of the original model ; on the basis of " ing integrate synthetically ", propose concrete pore structure compound body model and pore physical model of systemlex body ; chapter five carried on the corresponding test data to compares to the model parameter appearing in model of chapter four with and analyses, have received k value of the characteristic of strength of matrices of reflecting according to the method to return to analysis, and calculate the influence produced on the strength of concrete in revision that can probed into the content of cement, elastic mould and surface energy, exactness of the inspection model ; chapter six is the conclusion, according to studying the survey this text to some research conclusions of the pore structure and making corresponding prospect to the structure development of pore

    第一章回顧了孔結構在當今國內外的研究現狀,包括混凝土測孔方法的研究、孔結構模型的研究及孔結構與強度關系的研究現狀,介紹了孔結構研究方面的一些最重要的成果;第二章敘述了混凝土材料細觀結構的多尺度性及混凝土材料測孔技術的原理,並討論了水泥基多孔材料孔隙分析中常用的表徵參數,也說明了壓汞法測孔對研究結果的影響因素,指出了壓汞法在孔結構研究中的局限性;第三章是著重分析了孔隙率與強度關系模型的發展歷程,並對已有的模型進行了比較分析,指出了原有模型的不足之處;第四章在「綜合集成」的基礎上,提出了混凝土孔結構復合體模型和孔系統的物理模型,並模擬了該模型下由各單體並聯形成的復合體的斷裂過程,最後根據所建模型編制了應的計算程,可根據輸入的孔徑分佈與水泥含量等參數,實現混凝土理論強度的計算;第五章對第四章模型中出現的模型參數進行了應的試驗數據對比分析,根據回歸分析的方法得到了反映基體強度特徵的k值,並從理論上探討了水泥含量、彈性模量和表面能的修對混凝土強度計算產生的影響,檢驗模型的性;第六章是結論與展望,根據研究綜述了本文對孔結構的一些研究結論並對孔結構發展作了應的展望。
  5. Red books by a key, yellow books by the s key, blue book on the d button, according to a top - down order, and the press on january 1 corresponding to the color of the button, right, books will be an automatic add a corresponding book shelves

    紅色書籍按「 a 」鍵,黃色書籍按「 s 」鍵,藍色書籍按「 d 」鍵,按照有上至下的順,一一按下與顏色對應的按鍵,的話,書籍會一本一本自動放入到應的書架中。
  6. Combining with knowledge representation and automatic reasoning principle of ai and generic paradigm, the system has these main functions : ? it is able to show different solutions of typical example ; ( 2 ) it can automatically generate problems similar to the example for students to solve by providing them with clues ; ( 3 ) these problems can be studied by demonstrating the complete solution process and answers with the help of automated reasoning, or by providing real - time prompts to students concurrent with the students " solution processes with the help of automated reasoning ; ? it provides exercises and is able to call a program produced by the group ( the translator ), which transfers apla programs to executable programs so as to verify its correctness ; ( 5 ) it let teacher to add examples in the database ; etc. hi the course of systematic research, we deeply investigated the relevant knowledge of the system and made some innovation : about teaching content, we select par method as the main content

    本系統選用薛錦雲教授的par方法為主要教學內容,應用人工智慧的知識表示和自動推理原理及泛型思想,使得系統具有以下核心功能:展示幾種典型例題的解;以泛型思想為指導,實現了無限題庫,可以自動生成與典型例題類似的問題給學生求解並給予提示;對于這些題目,計算機可以自動推理出由問題到程的全過程供學生學習;也可通過自動推理根據用戶的實際做題情況實時給出提示,互動式地幫助學生學習演算法程設計;學生可以從問題庫中獲得練習,並調用轉換器,將自己的apla程轉化為可執行語言程,運行以檢驗其性;對教師而言,可以對已有的實例庫、問題庫進行添加操作等。在系統的研製過程中,我們深入研究了系統的各方面關知識,並進行了多方面的創新:在教學內容方面,首次選用par方法為主要內容。
  7. Combining with the research task researching on the deformation and stability of deep excavated cuts and high filled embankment of the traffic department in fujian province, based on the residual soil slope project on the project site at k15 + 183 of yong - zhang highway ( yong ' an section ), adopting non - linear theory, modern monitoring technology and numerical simulation technology, the deformation and stability of cutting cliff debris and residual soil slopes have been studied systemically and synthetically in the thesis. at the same time theory analysis, the analysis and estimate of field monitoring are taken into account in this course. main research work and working achievement are summed up as follows : ( 1 ) with the acquaintance of the trends and development about the deformation and stability of slopes at home and abroad, slopes are classified and summarized systemically

    並通過k15 + 183工點路塹土質邊坡的各類位移變形的監測成果驗證了該程性及適用性; ( 5 )通過應用大型有限元軟體ansys模擬分析,不僅分析了其隨著開挖時間步的應力應變關系,並模擬了與實際測斜管匹配的測斜路徑,通過對各開挖時間步的模擬計算分析,得到了與實測數據較符合的結果; ( 6 )綜合監測分析成果和極限平衡理論計算分析成果,對k15 + 183工點路塹邊坡的原設計坡率和幾何形態進行了優化計算分析,取得了較為滿意的結果。
  8. After the users input control tasks in three modes : natural language, electric sheet or flow char, the computer will receive the information of control demands by data mining and knowledge discovery. and then illation is leaded to select the hardware and program the software in the inner of the computer. afterward, control program is transformed in the file format of exiting simulation software by using the simulation interface and is opened in the simulation software

    用戶只需在pc機上以自然語言或繪制控制流程圖、填寫表格的方式輸入控制任務,然後在系統內部經過數據挖掘和知識發現分析得到可用控制要求信息,並自動引導推理求解過程進行硬體選型和生成應的控製程,最後利用模擬介面,自動將控製程轉化為現有的控制模擬軟體的文件格式,並在控制模擬軟體中,從而用戶可以對生成的控制系統進行模擬,檢查設計的性。
  9. Adopting the method of top - down, the virtual memory is divided into memory mange related unit ( segment unit and page unit ) and protection mode related unit ( protection test unit, debug test unit and exception detect unit ). data buses and control bused are designed separately for all of the units. vhdl codes are written and simulated

    Amex86的虛擬存儲器採用自頂向下的設計方法,把虛擬存儲器劃分為地址管理關單元(又包括分段單元和分頁單元) 、保護模式關單元(又包括保護測試單元、調試異常單元利異常檢測單元等) ,分別立其數據通路和控制通路,完成了vhdl的編碼和模擬工作,通過測試程模擬驗證了其功能的性並測定了基本性能。
  10. The hwtx - i gene was chemically synthesized according to its known cdna sequence, the gene was inserted into vector ppic9k which contained aoxj promotor and the sequence of a secreting signal peptide - a - factor, the cloning ppic9k / hwtx - i was constructed and confirmed by two - step pcr and dna sequence analysis, then it was transformed into host strain gs115, a his + muts cell line was screened and multicopy transformants were screened by various g418 concentrations, the multicopy transformant was named gh1. gh1 was cultivated in flasks. after 6 days of induction by 0. 5 % methanol, the supernatant was checked by 16. 5 % tricine - sds page, which showed there was a band in the position of 3. 5 - 6. 1kd, then it was isolated and desalted by ultrofiltration followed by ion exchange of cm column, after reverse phase hplc of ci8 and vacuum drying, the purified rhwtx - 1 was obtained which was proved to be correct recombinant hwtx - i by tricine sds - page, maldi - tof mass spectrometry, amino acid composition analysis, the n - terminal amino acid sequence and its biological activity, the final field of the purified rhwtx - i was about 80mg / l, accounting for 23. 6 % of it total secretory proteins

    將帶有hwtx -基因的ppic9k經blgii線性化后,轉化酵母宿主菌gs115原生質體后經篩選陽性克隆並經表型鑒定為his ~ + mut ~ s酵母菌,進一步用遺傳毒素g418篩選多拷貝的轉化菌株,命名為gh1 ;將gh1甲醇酵母菌用0 . 5的甲醇誘導表達,發酵上清經90飽和度的( nh _ 4 ) _ 2so _ 4沉澱, yw - 3 ( mwc03000 )的超濾膜超濾,再經cm陽離子交換, c _ ( 18 )反hplc純化得到分子量為4kd左右的組分,其中4289 . 05的組分經質譜鑒定,氨基酸組成分析和列測定為的表達產物,生物學活性表明其活性為天然毒素活性70 % ,表達量為80mg / l 。
  11. With the development of automobile industry and road transportation , the traffic accidents happen every day in the world and become a serious society problem the vehicle collision accidents are over 2 / 3 times as much as all traffic accidents they cause a large amount of social infuence and serious economic loss therefore , it is urgent to study vehicle collision accidents comprehensively and systematically , and the research also is the academic foundation to analyze and deal with traffic accident it is difficult to authenticate car velocity after traffic accident to dig over locate witness is right way mechanics is avaid tool in this field it is important to establish math model and this is precondition to calculate vehicle velocity firstly on the basis of summarizing the research results , this paper deeply discusses the calculating model to analyze the instantaneous motion state in the vehicle collision, the interrelation among the every moving mechanics parameters in the every phase of the collision secondly , according to the collinear collision and two - dimension collision and the restitution coefficient , the paper estabishesthe post collision movement models it proves that these models are correct and valid thirdly , this paper try to research reconstruction of road traffic accident and put forward the method on it

    對交通事故的科學分析應是建立在的數學模型與計算機模擬技術基礎上的定量分析,其基本條件就是要有能描述事故過程中汽車狀態的數學模型,只有建立的數學模型,才能較準地推定事故車輛的碰撞速度。所以建立地車輛碰撞模型和運動模型是汽車事故再現的關鍵問題。本文首先在總結前人研究的基礎上,深入地研究汽車碰撞理論,分析了車對車碰撞作用瞬間狀態的計算模型及碰撞恢復系數與碰撞前、后速度的關系;其次,根據交通事故中最普遍的一維和二維碰撞的不同情況,採用恢復系數和滑動摩擦系數等概念,分別建立了碰撞后車輛動力學模型;第三,對汽車碰撞事故再現進行了初步研究,定了車對車碰撞事故模擬計算和反推計算方法,並給出應的模擬程流程圖。
  12. In this paper, the bsp and collision detection is applied. the bsp is the sure way to achieve visually correct results by sort and render the transparent primitives from back to front

    將bsp技術應用於場景中任意順透明物體的繪制,解決了透明物體繪制時互遮擋不的問題。
  13. This rtcle finaily gave four basic jurisprudence principle and staed the concrete limit of our govemment ' s intervention in economy : constitution authorization principle discuss the limit of our govmment ' s intervention in economy from the power souree and powr limit of the govmment ' s intervention in economy ; legislation adjustment principle discuss the limit of our govemment ' s intervention in economy from the power - adjusting form and relatal law systems of our nmment ' s intervention in economy ; the principle of indirect adjusanent discusses the limit of our govmment ' s intervention in economy from the concrete means of our wmmen ' s interventthe in economy ; the proper procedure principle discusses the limit of our govmment ' s intervention in economy from the wothing mechanism of our govemment ' s intervention in economy, and at last set up the legitimate base of our govemment ' s intervention in economy of the moment

    為此,本文最後從分析法律自身具有限制這一特性出發,通過提出四個基本法理原則,論述當前我國政府干預經濟的具體限度:憲法授權原則從我國政府干預經濟的權力來源、權限范疇來論述我國政府干預經濟的限度;立法調控原則從我國政府干預經濟的權力調控形式及關法律體系來論述我國政府干預經濟的限度;間接調控原則從我國政府干預的具體方式來論述我國政府干預經濟的限度;當程原則從我國政府干預經濟的運行機制來論述我國政府干預經濟的限度,從而最終立當前我國政府干預經濟的當性基礎。
  14. The decoder is compiled and simulated in ep1c12q240c by quartusii - 5. 0. the different error style is added to the sequence received in emulated channel. correspondingly, the correct decoding results are attained at the output terminal

    在quartusii - 5 . 0模擬環境下以cyclone系列的ep1c12q240c為目標晶元對譯碼器進行了編譯和模擬,在接收列中加入不同的錯誤類型,應的在譯碼器輸出端得出了譯碼后的譯碼結果,驗證了設計方案的性。
  15. As a result, the studying aim of this paper is to establish a practical and complete system for the prediction of ship maneuvering motion, taking into account of the influence of the environmental factors, such as the wind, wave and current, establish a practical and complete system for the prediction of ship maneuvering motion. in this paper, the opengl virtual reality simulation technique is introduced into the field of ship maneuver and control, and using the mmg mathematical model, the three dimensional dynamic simulation system of the ship motion is established and good results are achieved. in the process of the system development, firstly, the maneuvering motion equations for ship in the still water are established, based on the mmg module mathematical model and serial experimental result

    在系統開發過程中,首先採用mmg分離式數學模型及關的系列化試驗結果,建立單槳單舵海洋運輸船舶在靜水中的船舶操縱運動方程,並編制計算程,經與試驗結果比較,證實了計算結果的性;為了解mmg數學模型中模型參數變化對操縱性指數的影響程度,作者在上述已有程基礎上,對有關模型參數進行偏移修,探討了應參數變化后的操縱性指數,對船舶操縱性指數對模型參數的靈敏度進行了詳細的分析與探討,所得結論與工程實際吻合,具有實際應用價值,並為進一步提高船舶操縱性預報的精度打下了基礎;然後,在已有的船舶靜水操縱運動模型基礎上,考慮雙槳雙舵的影響,建立了內河雙槳雙舵船舶的操縱運動模型;最後,綜合考慮風浪流作用力的影響,進行了船舶的操縱運動模擬計算。
  16. As the formalized method and program validity testifying technology are still waiting to be practically applied. software testing still is the effective method to insure the quality of software

    在目前形式化方法和程性證明技術還無望成為實用性方法的情況下,軟體測試在將來當一段時間內仍然是軟體質量保證的有效手段。
  17. Quantitatively describing the principle of protein - protein interactions and recognition in molecular level is the key point for understanding the relationship between structure and function of protein complexes and designing protein complexes, hi these interactions among proteins, electrostatic and hydrophobic interactions are the two most important ones, which let protein molecules bond systematically

    在分子水平上定量地闡明蛋白質分子之間的親合力和互識別的機制,是地認識蛋白質聚集體結構和功能之間的關系併合理地設計出有用的蛋白質分子聚集體的關鍵。蛋白質分子間互作用,其中最主要的是靜電和疏水互作用,使蛋白質分子能有地結合在一起。
  18. Taking the characteristics of road and bridge engineering into account, this paper makes systematic analysis and study on applications of static gps in data processing of surveying in road and bridge engineering : the feasibility of using single point positioning result as starting point is studied and the influence of it on baseline solution is discussed ; on account that the software provided along with instrument by vendors usually does not support coordinates in the independent engineering coordinates system from gps observations, a simple and effective method is represented for the gps data processing in the independent engineering coordinates system and is programmed. through real examples the method and programs are testified ; from gps surveying the wgs - 84 coordinates are acquired, while in reality coordinates in local coordinate system are needed, so conversion from wgs - 84 coordinates to local coordinates is necessary

    結合路橋工程的特點,對靜態gps在路橋工程式控制制測量中的數據處理作了系統的分析和研究: ?對單點定位結果作為起算點的可行性進行了研究,並探討其對基線解算的影響; ?鑒于商家提供的隨機軟體往往不支持利用gps觀測得到工程獨立坐標系中坐標,為工程獨立坐標系gps數據處理提供了一種簡便有效的方法,並編制了關的處理程,通過實例驗證,程的、方法是可行的; ? gps測量得到的是wgs - 84坐標,而實用上需要的是地方坐標系坐標,因而得把wgs - 84坐標轉換地方坐標系坐標。
  19. The discovering of the rule that a pair of hexagrams have opposite meanings, will help us to understand the original meanings of the 64 hexagrams, the xuguazhuan and the zaguazhuan, and will help us to study the history of 1 - ching learning deeply

    么二耦、反為義這一意義結構規律的發現,有助於我們認識了解《周易》六十四卦的本義,也有助於認識(雜卦傳和卦傳,有助於易學史研究的深入聞展。
  20. Finally, the demonstration & analysis on the electronic and telecommunications equipment industry have been put up in the state - owned layer in this paper which is the first support industries for china. the sufficienty & essentiality have been demonstrated of that guideline of both economic benefit and science & technology act as input variables for measure. the material guideline system has been constructed to indicate the two order - parameters and self - organization synergetic macro effect of industrial organization s

    在論證了經濟效益指標、科技評價指標作為測度輸入變量的充要性,構造了充分表徵專業化、信息化參量和產業組織系統自組織協同宏觀效果的具體指標體系基礎上,給出了產業組織系統有度、協同度模型,並應用此模型實證了該產業組織系統近幾年協同演進狀況,計算結果與事實符,為該產業的進一步協同發展提供了重要的戰略依據,同時進一步證明了本文理論的性與客觀性。
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