趁空

chèn kòng kàn chǎng diàn yǐng

趁空看场电影

go to a cinema at one's spare time

chèn kòng zài zuò

趁空再做

do it at your leisure

chèn kòng xǐ gè zǎo

趁空洗个澡

use a free moment to take a shower

wǒ chèn kòng qù kàn le kan lǎo wáng

我趁空去看了看老王。

I went to see Lao Wang when I happened to have a few minutes to spare.

chèn kòng hé xià yǎn

趁空合下眼

catch a few winks when there is time