Taxonomically, the very definition of a bird was until recently an animal that has feathers.

直到最近在分类学上，鸟的定义是一只有羽毛的动物。

youdao

Taxonomically, the very definition of a bird was until recently an animal that has feathers.

直到最近在分类学上，鸟的定义是一只有羽毛的动物。

youdao