关紧

bù guān jǐn de xì zhī mò jié

不关紧的细枝末节

unimportant detail

zhè xiàng kǎo lǜ fēi cháng guān jǐn

这项考虑非常关紧。

This consideration was very important.

shuì jiào shí bù yào jiāng suǒ yǒu de chuāng hu dōu guān jǐn

睡觉时不要将所有的窗户都关紧。

Do not fasten all the windows up while you sleep.

bǎ mén guān jǐn

把门关紧

make fast the door