洗手间的门锁坏了，你可以在外面帮我把关吗？

Xǐshǒujiān de ménsuǒ huài le, nǐ kěyǐ zài wàimiàn bāng wǒ bǎguān ma?

The bathroom door lock is broken—can you stand outside and keep watch for me?

贼人一个负责偷东西，一个负责在门口把关。

Zéirén yí gè fùzé tōu dōngxi, yí gè fùzé zài ménkǒu bǎguān.

One thief was responsible for stealing, and the other kept watch at the door.

这里的保安严格把关，绝对不会乱让陌生人随便进入。

Zhèlǐ de bǎo'ān yángé bǎguān, juéduì búhuì luàn ràng mòshēngrén suíbiàn jìnrù.

Security here is very strict and definitely won’t let strangers enter casually.