背孔類 的英文怎麼說

中文拼音 [bēikǒnglèi]
背孔類 英文
notostigmophora
  • : 背動詞1. (用脊背馱) carry on the back 2. (擔負) bear; shoulder
  • : Ⅰ名1 (許多相似或相同的事物的綜合; 種類) class; category; kind; type 2 (姓氏) a surname Ⅱ動詞...
  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

    奔龍是一較為特殊的手盜龍( maniraptora ) ,它具有許多與始祖鳥archaeopteryx甚至其它早期鳥相似或接近的特徵,主要表現在:叉骨u形與始祖鳥和子鳥的相同,肋鉤狀突在子鳥和個別反鳥中也存在,肩臼窩絕大部分指向側方似於始祖鳥,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. The envelop capacity of seal influence the formationand and scale of reservoir. the main kind of trap is structure trap as anticlinal or fault anticlinal with high closure height and big area. so the trap is put into effect and its formation match the period of hydrocarbon runoff

    雀河斜坡圈閉型以斜和斷斜等構造圈閉為主,閉合面積幅度大,落實程度較高,而且圈閉形成期與排烴期相匹配,在現階段圈閉條件不是影響成藏的主要因素。
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