羽毛

zhè zhī niǎo yǔ máo fēng mǎn

这只鸟羽毛丰满。

This bird is in full feather.

zhè zhī xiǎo niǎo hěn kuài jiù yào zhǎng chū yǔ máo le

这只小鸟很快就要长出羽毛了。

The chick will soon feather out.

niǎo yǔ máo de yǔ zhóu yī bān shì zhōng kōng de

鸟羽毛的羽轴一般是中空的。

The stem of the bird feather is usually hollow.

bù ài xī yǔ máo

不爱惜羽毛

singe one's reputation