| 单词 | 后肢 |
| 释义 | 〔cetacean〕Any of various aquatic, chiefly marine mammals of the order Cetacea, including the whales, dolphins, and porpoises, characterized by a nearly hairless body, anterior limbs modified into broad flippers, vestigial posterior limbs, and a flat, notched tail.鲸目动物：鲸目动物中的一种水生动物，主要是海生哺乳动物，包括鲸、海豚和鼠海豚， 特征为身体几乎无毛、前肢变成宽大的鳍、后肢退化及尾扁平而分叉〔gaskin〕The part of the hind leg of a horse or related animal between the stifle and the hock.胚部：马或其他有关动物后肢膝关节和跗关节之间的部位〔crus〕The section of the leg or hind limb between the knee and foot; shank.小腿，胫：位于膝盖和脚之间的腿部或后肢的部位；胫〔leg〕One of the lower or hind limbs in human beings and primates.腿：人类或灵长目动物下肢或后肢中的一只〔siren〕Any of several salamanders of the family Sirenidae, such as the mud eel, having an eellike body, permanent external gills, small forelegs, and no hind limbs.（海牛类的）蝾螈：一种木鳗属动物，例如泥鳗，其有鳗状的身体，有时有一外部腮和小前肢，但无后肢〔bat〕Any of various nocturnal flying mammals of the order Chiroptera, having membranous wings that extend from the forelimbs to the hind limbs or tail and anatomical adaptations for echolocation, by which they navigate and hunt prey.蝙蝠：一种翼手目的夜间飞行的哺乳动物，它们具有能从前肢伸到后肢或尾巴的膜状翅膀，其生理结构能够靠声波定位，并以此导航和捕食 |
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