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gill arch造句怎么写

gill arch造句

2、The results demonstrated that the external morphological structure of gill rakes, the gill arches and the gill filaments showed the presence of various features such as annular ridge and short lines.

1、Shubin writes: "the conclusion was inescapable: the same gill arch that formed part of the jaw of a reptile formed ear bones in mammals."

3、He had been following the development of gill arches, swellings around the base of the embryonic head, in mammals and reptiles.

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