頂齒 的英文怎麼說

中文拼音 [dǐngchǐ]
頂齒 英文
apical denticle
  • 頂 : i 名詞（人體或物體的最上部） crown; peak; top Ⅱ動詞1 （用頭支承） carry on the head 2 （從下面拱...
  • 齒 : Ⅰ名詞1 （牙; 牙齒） tooth 2 （物體上齒形的部分） a tooth like part of anything 3 [書面語] （年齡...
  1. Characteristics : perennial pubescent herb ; leaves dimorphic, the radical with 3 - lobes, coarsely serrate at margin ; cymes terminal ; flowers yellow, to 2 cm diam., sepals 5, petals 5 or more ; fruit consisting of many aggregated achenes

    形態：多年生草本，被毛；葉兩形，基生葉3裂，粗鋸齒緣；聚傘花序頂生；花黃色，直徑可達2公分，花萼5片，花瓣5片或更多；頭狀聚合瘦果球形。
  2. Leaves papery, oval in outline, 6 - 7cm long and 8 - 11 cm wide, base rounded or subtruncate, trilobed or sometimes 5 - lobed ; lobes triangular - ovate, rarely ovate - oblong, apex acute or acuminate, margin serrulate, with appressed acute teeth, sometimes entire near base, glabrous or with tufted hairs at vein axils abaxially ; petiole 2 - 3 cm long, glabrous

    葉紙質，輪廓闊卵形，長6 - 7厘米，寬8 - 11厘米，基部圓或近截平， 3裂或有時5裂，裂片三角狀卵形，有時卵狀長圓形，頂端漸尖，邊緣有疏而銳利地鋸齒，有時近基部全緣，兩面無毛或下面脈腋有簇毛；葉柄長2 - 3厘米，無毛。
  3. Leaves tufted ; stipes 15 - 30 cm long, densely scaly at base, glabrous above ; sterile lamina about 60 cm long and 20 cm wide, simply pinnate ; pinnae numerous, alternate or subopposite, linear - lanceolate, the largest about 12 cm long and 1 cm wide, base cordate, apex acuminate, margin finely toothed ; veins close, forking once or twice and forming areoles near the midrib ; fertile lamina similar to sterile ones, but somewhat reduced, about 8 cm long and 0. 4 cm wide, lower surface almost entirely covered with sporangia

    葉簇生；葉柄長15 - 30厘米，基部密被鱗片，向上近光滑；不育葉片長約60厘米，寬20厘米，一回羽狀；羽片多數，互生或近對生，線狀披針形，最長者長達12厘米，寬約1厘米，頂端長漸尖，基部心形，邊緣有細密鋸齒；葉脈1 - 2次分叉，近中脈形成網眼；能育葉與不育葉相似，但較小，長約8厘米，寬約0 . 4厘米，下部滿布孢子囊。
  4. Leaves opposite, papery, ovate, suborbicular or elliptic, 4 - 8 cm long, apex rounded, base rounded to broadly cuneate, margin with regular and slightly sinuate teeth except base, covered with yellowish brown tufted appressed hairs ; petioles 0. 6 - 1. 5 cm long

    葉對生，紙質，圓卵形、近圓形或橢圓形，長4 - 8厘米，頂端圓形，基部圓形至寬楔形，邊緣除基部外具整齊而稍帶波狀的鋸齒，兩面被黃褐色簇狀短伏毛；葉柄長6 - 15毫米。
  5. The water current flows over the top of the dentoid baffle to the hydraulic jump as additional momentum. while it is cooperated with a stilling basin, the flowing condition emerged in the basin may be improved greatly and the length and downstream water depth required by the basin can be decreased to a great extent. such an appliance may be also used to solve the problems of insufficiently dissipating water flow energy and aerating flow, which are often faced with those hydraulic engineering constraction as acted by high waterhead, great specific discharge and low froude number

    本文通過齒墩頂部的擴散水舌所形成的附加射流，從上部射入水躍，即可改善消力池內的水流流態，又可降低第二共軛水深，減小水躍長度，增進水躍消能效果，同時還能解決大單寬、低佛勞德數條件下摻氣和消能不足的問題，試驗證實它是一種安全、經濟的消能工。
  6. He wears his officer's cap at an angle, jaunty, and picks his teeth with a sharpened goose quill.

    他瀟灑地微微歪戴著他那頂軍帽子，用一支削尖了的鵝毛管剔著牙齒。
  7. Addendum modification of external spur and helical gears

    外嚙合圓柱齒輪和斜齒輪的齒頂高修正
  8. A gear operator may easily be mounted on top of the external support plate of all stem extensions

    一個齒輪操作機構可以容易的安裝在所有閥桿加長件的外部支撐板的頂部。
  9. Witch has worked out the tooth shape of datum rack and computer simulation of gear manufacture. pointedness, undercut and tooth tip becoming sharp are analysed. tooth thickness calculation and measurement, superposition coefficient calculation and belt length calculation are resolved

    2 、給出了基準齒條的齒廓形狀，進行了齒輪加工計算機模擬，分析了可能出現的稜角問題，進行了齒輪內齒頂圓的求解、根切問題分析、齒厚計算與測量、齒頂變尖的分析、重合度的計算、帶長度的計算及齒輪設計的程序編制等。
  10. Black crested thread

    黑齒頂螺紋
  11. They bent him over a gear - box and one of them held a phillips screwdriver to his temple while they gave him the business

    安迪按在一個齒輪箱上，他們上他時，其中一個人用菲利浦螺絲起子頂著他的太陽穴。
  12. The thirty - four species of the sea urchins belong to 7 order, 17 families and 28 genera. the following is the name list, those with an asterisk are the species recorded for the first time in china. order cidaroida family cidaridae * goniocidaris biserialis ( d6derlein ) * stylocidaris bracteata ( a. agassiz ) * stylocidaris ryukyuensis shigei * stereocidaris indica philippinensis mortensen * rhopalocidaris gracilis doderlein order lepidocentroida family echinothuridae * phormosoma bursarium ( a. agassiz ) araeosoma owstoni mortensen asthenosoma ijimai yoshiwara order stirodonta family phymosomatidae glyptocidaris crenularis a. agassiz family arbaciidae * coelopleurus maculata a. agassiz et h. l. clark * coelopleurus undulatus mortensen order aulodonta family diadematidae chaetodiademajaponicum mortensen family pedinidae * caenopedina mirabilis ( d6derlein ) order camarodonta family temnopledridae temnopleurus hardwickii ( gray ) temnopleurus toreumaticus ( leske ) temnopleurus reevesii ( gray ) temnopleurus apodus ( a. agassiz et h. l. clark ) temnotrema sculptum ( a. agassiz ) temnotrema reticulatum mortensen * microcyphus olivaceus ( d6derlein ) * prionechinus forbesianus ( a. agassiz ) family strongylocentrotidae strongylocentrotus nudus ( a. agassiz ) hemicentrotus pulcherrimus ( a. agassiz ) family echinometridae anthocidaris crassispina ( a. agassiz ) order clypeasteroida family clypeasteridae clypeaster virescens doderlein family laganidae * peronellapellucida d5derlein family scutellidae * scaphechinus mirabilis a. agassiz sinaechinocyamus planus liao family fibulariidae fibularia acuta yoshiwara order spatangoida family loveniidae - lovenia triforis koehler echinocardium cordatum ( pennant ) family schizasteridae schizaster lacunosus ( linnaeus ) family brissidae * gymnopataqus magnus ( a. agassiz & h. l. clark ) family spatangidae * spatangus luetkeni a. agassiz among the species reported, the following species call for notes or simple descriptions

    本文根據th . mortensen （ 1928 - 1955 ）海膽專著（ amonographoftheechinoidea ）中的主要分類依據，將海膽綱分為8個目： 1 ）頭帕目（ cidaroidea ）有齒器，圍肛部在頂系內，圍口部有步帶板和間步帶板，大棘很大，有外皮層，無球棘； 2 ）鱗棘目（ lepidocentroida ）有齒器，圍肛部在頂系內，圍口部僅有步帶板，大棘不很大，無外皮層，有球棘； 3 ）脊齒目（ stirodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方不相接，顎孔開放； 4 ）管齒目（ aulodonta ）齒器的齒無脊，圍肛部在頂系內； 5 ）拱齒目（ camarodonta ）有齒器，圍肛部在頂系內，齒器的齒有脊，橈骨片在齒上方相接，顎孔封閉； 6 ）全雕目（ holectypoida ）有齒器，但不發達或完全被吸收，圍肛部在頂系外，步帶不形成瓣狀和葉鰓； 7 ） ?形目（ clypeasteroida ）齒器發達，圍肛部在頂系外，步帶形成瓣狀，無葉鰓； 8 ）蝟團目（ spatangoida ）無齒器，圍肛部在頂系外，葉鰓發達，步帶形成瓣狀。
  13. For the bldcm which has a general crest width of the back - emf waveform, two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models. in addition, a comparison is carried out between these two conditions, which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value

    闡述了抑制齒槽轉矩措施對反電動勢波形的影響，利用無刷直流電機的數學模型推導並比較了任意平頂寬度梯形波反電動勢在正弦波和矩形波兩種電流驅動下的電磁轉矩脈動情況，得出在梯形波平頂寬度減小到一定數值后採用正弦電流驅動更有利於減小電磁轉矩脈動。
  14. On the condition of “ many - head ” and “ small drive ratio ” ， the plane double enveloping hourglass worm can not settle the problem of undercutting and sharpening simultaneously. it has devoted to a new type hourglass worm _ sphere double enveloping hourglass worm. the coordinate system is established according to the frock. the meshing equation and the tooth equation of worm and gear have been developed and the distribution of contact line on gear tooth is analyzed. to evaluate the meshing quality ， four meshing quality indexes and five original parameters are put forward. through mass programming computing ， the relations between meshing quality and original parameters are derived and depicted by graphs

    考慮到平面二次包絡環面蝸桿傳動在多頭小傳動比條件下根切與齒頂變尖的矛盾很難同時解決且嚙合性能較差，介紹了一種新型環面蝸桿傳動? ?球面二次包絡環面蝸桿傳動.在研究過程中，根據工裝建立了坐標系，根據一二包過程的運動關系推得了嚙合方程和蝸桿與蝸輪的齒面方程，分析了蝸輪齒面上的接觸線分佈.為了評價嚙合性能，提出了4項性能指標和5項原始參數，通過大量編程計算得到了嚙合性能指標與原始參數之間的關系，並以圖表直觀的表示
  15. General ? for both the basic and cpvc housed stem extensions, the bottom rod coupling utilized for all ball valve extensions is fitted with turning - stops

    一個齒輪操作機構可以容易的安裝在所有閥桿加長件的外部支撐板的頂部。
  16. Measurement and instrument of addendum circle and dedendum circle diameter of odd tooth gears

    奇數齒齒輪齒頂圓與齒根圓直徑的測量及其量具
  17. Addendum modification of straight spur gears in the 05 - system ; introduction

    -系統的直齒正齒輪的齒頂高修正.導言
  18. A long - handled implement with a row of projecting teeth at its head, used especially to gather leaves or to loosen or smooth earth

    耙子，耙機頂部有一排凸出的齒的長柄工具，尤指用於收集樹葉或疏鬆土壤的
  19. Set up the following 2d parametric models : ( dinitial contour of cone. ( 2 ) six types of inserts : cut insert, conical insert, ovoid insert, chisel insert, gage insert and scoop chisel insert. ( 3 ) twelve types of slots : six slots between the rows of inserts ; six slots on the head of cone

    建立了以下幾種二維參數化模型： （ 1 ）牙輪初始輪廓； （ 2 ）六種牙齒，包括平頂齒、錐形齒、球形齒、楔形齒、邊楔齒和勺形齒； （ 3 ）十二種齒槽，其中六種牙輪齒圈之間的齒槽、六種牙輪頂端的齒槽。
  20. Skeletochronology has been widely and successfully used to age temperate amphibians, enabling geographic comparisons of longevity and the age at maturity

    採用金頂齒突蟾（ 10 %福爾馬林固定）為材料，對兩棲類年齡鑒定方法進行了摸索。
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