evolutionary trend 中文意思是什麼

evolutionary trend 解釋
進化趨向[趨勢
  • evolutionary : 發展的
  • trend : n （路、河、海岸、山脈等的）走向；方向，方位；傾向，趨勢，動向。 the trend of events 形勢。vi 走...
  1. The feathers attached to the arms and the tail evidently possess the structures of " modern feathers ", which consisting of the central shafts ( rachis ) and parallel barbs. dromaeosaurids are unusual group of maniraptoran theropods. they share many similar or the same features with archaeopteryx or other primitive birds, such as : u - shaped furcula, uncinate process, laterally facing glenoid of shoulder girdle, comparatively long forelimb, large semilunate carple, retroverted pubis, ascending process of astragalus, and " modern feathers " with rachis and barbs etc. these facts indicate not only that dromaeosaurids had developed many bird - like characters in course of the advanced maniraptorans toward birds, but also that there seemed to be the co - evolutionary trend between the feathers and the skeletal bones

    奔龍類是一類較為特殊的手盜龍類（ maniraptora ） ，它具有許多與始祖鳥archaeopteryx甚至其它早期鳥類相似或接近的特徵，主要表現在：叉骨u形與始祖鳥和孔子鳥類的相同，背肋鉤狀突在孔子鳥類和個別反鳥類中也存在，肩臼窩絕大部分指向側方類似於始祖鳥，肩胛骨與烏喙骨間的夾角非常接近90也和始祖鳥的相似，前肢從比例上講顯得較長，大的半月形腕骨使肘部能向側方折過來，恥骨伸向後下方，距骨上升突與原始鳥類中的為同源結構，羽毛已有顯著的分化且具備了現代羽毛的基本結構等等。
  2. This study : ( 1 ) provides the most detailed osteological and integumentary descriptions on liaoning deinonychosaurs ; ( 2 ) proposes an evolutionary model for feather evolution ; ( 3 ) analyzes the interrelationships of the coelurosauria ; ( 4 ) evaluates the effects of combining information from different parts of the body in reconstructing coelurosaurian evolution, and ( 5 ) discusses the evolutionary trend within the coelurosauria and particularly those features related to the origin of avian flight

    本研究： （ 1 ）提供了有關遼寧恐爪龍類最詳細的骨骼學信息； （ 2 ）提出了羽毛演化的一個新模型； （ 3 ）綜合地分析了虛骨龍類的系統關系； （ 4 ）分析身體不同部位的信息對復原系統發育的影響及虛骨龍類各個演化階段身體不同部位的相對演化程度； （ 5 ）討論了虛骨龍類的演化趨向，尤其是和飛行起源相關特徵的變化。
  3. The seeds of 10 species ( 96 samples ) of the genus schisandra michaux were observed tinder light microscope and scanning election microscope. the results indicate " that : the macroslructural features of seed surface, including smooth type, rugulose type and tuberculate type, may suggest the evolutionary trend from smooth type to rugulose type, from rugulose type to tuberculate type ; the microstructural features of outer epidermis can be divided into two types, viz. verrucate type and reticulate type

    結果表明：該屬的種子宏觀形態呈現平滑、細皺紋或瘤狀突起，並認為五味子屬種子形態可能有從平滑到有細皺紋再到有瘤狀突起的演化趨勢；該屬種皮表面微觀形態可分為疣狀突起型（如：大花五味子、北五味子、東亞五味子、狹葉五味子、毛葉五味子、翼梗五味子和二色五味子）和網紋型（如：鐵箍散和重瓣味子） 。
  4. A central evolutionary trend of the microtine is the gradual development of rootless, very high - crowned cheek teeth that grow throughout life and are well adapted to a highly abrasive diet most fossil specimens are cheek teeth of voles

    Eva 。田鼠亞科的歸屬，目前有兩種觀點。一種是將它作為倉鼠科下的一個亞科，另一種是將它作為鼠科下的一個亞科。
  5. The spread and roles of the evolutionary trend in modern china

    進化思潮在近代中國的傳播及其作用
  6. The evolutionary trend of accounting behavior in post non - tradabe share reform era

    后股權分置時代會計行為演變趨勢研究
  7. Brief speculation on the evolutionary trend of the seed - coat micromorphological features of the genus kadsura is discussed

    在種皮微形態特徵的研究基礎上，還討論了各種類型的演化趨勢。
  8. Lastly, the evolutionary trend of some characters and an important factor causing sect. moutan endangerment has been discussed and analyzed

    另外，對有關性狀的演化趨勢和導致牡丹組植物瀕危的可能因素進行了分析。
  9. In the end, we forecasted the evolutionary trend of the river terraces in the mid - tail of weihe river according to their evolutionary characteristics

    最後，根據渭河中下游各河谷階地的演化特點對其演化趨勢進行了初步的預測。
  10. The evolutionary trend of the germination apertures of the pollen grains in this tribe may be from the absence of germination apertures to the presence of 3, 4 - colpate, then to 3 - colporate germination aperture

    無萌發孔的山莫若屬是原始類群，三孔溝的馬尿泡和天仙子等屬是進化類群。
  11. The characteristics of precipitation, temperature and their combination determined the special ecological environment pattern of ordos plateau. to study its evolutionary trend contributes to understanding the succession process of the ecological environment of ordos plateau

    降水、溫度及其組合特點決定了鄂爾多斯高原特殊的生態環境格局，分析其演變趨勢有助於理解鄂爾多斯高原生態環境的演變過程。
  12. In the most extreme condition in uni - ovulate cone, the female reproductive unit ( fru ) occupies the position of the terminal bud. an evolutionary trend of reduction is supported in the genus from tri - ovulate to uni - ovulate cone, in which the bract number and seed number are reduced, and the seed size and seed surface sculpture are increasing

    總之，麻黃屬雌球花有簡化的趨勢，伴隨著這種趨勢，雌球博士學位論文中國麻黃屬植物的分類? ?兼論麻黃屬的演化花苞片數目減少、種子數目減少、種子體積增大、表面復雜度增加。
  13. Zhang xian initial this trend, succeeded by the school of su, suxin and zhoujiang, which is the evolutionary course of songci

    宋次韻詞主要有對歌型、合唱型、自和型、模仿型四種類型。
  14. The main results are as follows : ( 1 ) the evolutionary features of precipitable water in the whole troposphere in northwest china are different between over the east region and over the west region during the past 50 years from 1951 - 2000 : in the 1990s " the pv in the east of ncw is evidently decreased, and the scope of the descent is the largest one in the same latitude over the north - hemisphere, on the contrary, which in the west regions showed increasing trend

    最後，分析了近50年來西北地區東部垂直運動強度的年代際變化特徵。主要得出了如下結論： （ 1 ）西北地區東、西部對流層整層大氣可降水量在1951 - 2000年近50年來表現出不同的變化趨勢： 90年代以來，東部明顯減少，而西部有所增加，且東部減少的幅度在北半球同緯度地區最大。
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