【化】 氧气面具
在线英汉词典
oxygen mask的短语、例句：
oxygen mask mask placed over the nose and mouth through which a person can breathe oxygen, eg in an aircraft or hospital 氧气面具; 氧气罩
Oxygen masks are used in aircraft only in emergencies. 飞机上的氧气面具只用於紧急情况.

标签：oxygen mask,用法,音标,短语