The mask was meant as a barrier against disease, asbestos from collapsed buildings and the smell of rotting corpses.

这意味着，在我和疾病、灰尘以及死亡气息之间有了一道屏障。

youdao

Jetlagged on his arrival from Abu Dhabi, he suffered a scare when a crowd barrier collapsed on him during his opening match, a straight sets win over Seppi.

CNN: Double disappointment for World No.1 Djokovic