链子

jiě kāi liàn zi hěn róng yì

解开链子很容易。

It's easy to undo the chain.

tā yào zhèng tuō liàn zi

他要挣脱链子。

He wants to break the chain.

tā yòng liàn zi shuān zhe gǒu

他用链子拴着狗。

He leashes the dog with a chain.

zì xíng chē liàn zi

自行车链子

roller chain of a bicycle