腕羽 的英文怎麼說
中文拼音 [wànyǔ]
腕羽
英文
secondary-
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。Investigation on relative factors of wrist and shoulder injuries in badminton sports
羽毛球運動中發生手腕和肩袖損傷的相關因素調查The rules of badminton are similar to those for tennis, but the method of player playing is quite different. badminton requires flexible wrist actions. the racket can be held with a " shake hand " grip, but needs to be adjusted constantly in response to different ball movements
羽毛球的規則大致跟網球一樣，但是打法和網球不同.羽球注重腕部的靈活運動，握拍方式雖然也有[菜刀式]握法，好適應多變化的球路
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