This faster-moving air provides the pelvic fin with additional lift.

这个快速移动的气流向尾鳍提供了额外的升力。

youdao

In each type, fish body may produce varied changes and form some appendages, such as oral disk, pelvic fin disk and thorax disk.

在各种类型中，鱼体上又有不同的形态结构产生。

youdao

In each type, fish body may produce varied changes and form some appendages, such as oral disk, pelvic fin disk and thorax disk.

在各种类型中，鱼体上又有不同的形态结构产生。

youdao