乘警

chéng jǐng shuō xíng li cāng yǐ jīng fēng bì le

乘警说行李舱已经封闭了。

The air marshal says the baggage area was closed.

huǒ chē kāi dòng shí chéng jǐng jìn zhǐ wǒ men bǎ tóu shēn dào chuāng wài

火车开动时，乘警禁止我们把头伸到窗外。

The guard forbade us to look out of the window when the train was moving.