oxygen mask

汉语翻译

英语解释：

名词 oxygen mask:

1. a breathing device that is placed over the mouth and nose; supplies oxygen from an attached storage tank

例句：

1. If air is needed, the oxygen mask in the plane will pop down by itself.
   如果空气缺乏，飞机内的氧气面罩会自动放下。
2. An oxygen mask will come down from overhead in case of an emergency.
   若发生紧急情况，头顶上会降下一只氧气面罩。