英语语法分析

The bright plumage of many male birds was thought to have evolved to attract females.

许多雄鸟的鲜艳羽毛被认为是为吸引雌鸟而进化来的。

《柯林斯英汉双解大词典》

For example, the ostrich has plumage that is so constructed that the feathers are long but not too dense.

例如，鸵鸟的羽毛构造使它的羽毛长而不密。

Emu is a large Australian flightless bird, similar to the ostrich but with three-toed feet and grey or brown plumage.

鸸鹋是一种大型的澳大利亚不会飞的鸟，类似于鸵鸟，但是有三趾的脚和灰色或棕色的羽毛。