He watched them secretly,through a chink in the wall.

他透过缝暗中监视他们。

I noticed a chink of light under the door.

我注意到门底缝隙有光。

The one chink in her armour is the lack of a sense of humour. She hates people laughing at her.

她的弱点之就是缺乏幽默感，她讨厌别人取笑她。