譬如，一部分皮肤可能被拉出形成腮或者被推进去形成肺，这样吸收氧气的表面积便以该动物的体积成比例地增加了。

For example, a part of the skin may be drawn out into tufts to make gills or pushed in to make lungs, thus increasing the oxygen-absorbing surface in proportion to th animal's bulk.

youdao

譬如，一部分皮肤可能被拉出形成腮或者被推进去形成肺，这样吸收氧气的表面积便以该动物的体积成比例地增加了。

For example, a part of the skin may be drawn out into tufts to make gills or pushed in to make lungs, thus increasing the oxygen-absorbing surface in proportion to th animal's bulk.

youdao