小兔子正在啃胡萝卜。

xiǎo tùzi zhèngzài kěn húluóbo.

The little rabbit is nibbling on a carrot.

狗狗啃着骨头玩得很开心。

gǒugǒu kěn zhe gǔtou wán de hěn kāixīn.

The dog is happily gnawing on a bone.

他一个人在图书馆里啃书，准备研究生考试。

Tā yí gè rén zài túshūguǎn lǐ kěnshū, zhǔnbèi yánjiūshēng kǎoshì.

He is burying himself in books alone in the library, preparing for the graduate entrance exam.