Amphibians are tetrapods (Gr. tetra

Amphibians are tetrapods (Gr. tetra, four + l)oclos, foot). The name is derived from
the presence of four muscular limbs and feet with toes and fngers (digits). Some zoologists
use t e term "Tetrapoda" to formally refer to all sarcopterygian descendants that pos-
sess well-formed forelimbs and hindlimbs. Other zoologists reserve the term tetrapod for
“crown-group animals." The tetrapod crown group includes the extant (living) tetrapods
plus their most recent common ancestor. Tetrapod, in this sense, refers to living amphib-
ians (often called Lissamphibia [lis'am-fib'e-ah]), the reptiles, birds, and mammals, and
the common ancestor of these groups. A host of extinct¨stem tetrapods" is excluded from
this use of the term“Tetrapoda." The term“Stegocephalia" is an older term that has been
redefined to refer to the clade that includes the Tetrapoda and their four-legged relatives.

結果 (中文) 1:

两栖动物是四足动物 (克 tetra，四 + l) oclos，脚)。名称是从派生的。四个肌肉发达的四肢和脚脚趾与 fngers （数字） 的存在。一些动物学家使用 t e 项"Tetrapoda"正式指上颌骨的所有子代，pos-扩格式良好前肢和后肢。其他动物学家保留期限为四针状"皇冠集团动物"。四针状的皇冠集团包括现存的 （生活） 四足动物再加上他们最近的共同祖先。四足动物，在这个意义上讲，是指生活 amphib-ians （通常称为 Lissamphibia [lis'am-fib'e-啊]），爬行动物、 鸟类和哺乳动物，和这些群体的共同祖先。Extinct¨stem 四足动物宿主"被排除这种用法的词"Tetrapoda"。"Stegocephalia"一词是一个老的术语，已经重新定义来引用这个演化支，其中包括 Tetrapoda 和四条腿的亲人。

結果 (中文) 3:

amphibians are tetrapods（GR。四、炉+ L）oclos，足球）。the name is derived fromthe presence of炉脚手脚和脚趾和肌肉与fngers（位）。一些动物学家用T E项“四足类“to formally refer to all that POS肉鳍后裔前肢和hindlimbs sess好成。其他动物学家tetrapod储备the term for“冠集团的动物。“the tetrapod皇冠集团（生活）tetrapods extant includes the更最近的共同祖先的。tetrapod refers to，in this感，生活amphib -ians（often called滑体亚纲（lis" AM fib" E啊），爬行动物，鸟类和哺乳动物，and这些团体共同祖先。在主机of extinct¨stem tetrapods”is excluded from这use of the term”的四足类。“the term”stegocephalia”is an older term that has been重新定义to refer to the分支that includes the四足四足类及其有关。