| 单词 | 氧气面具 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔don〕We donned oxygen masks as we began an emergency descent.我们在开始紧急下降时戴上了氧气面具。英汉大词典〔oxygen mask〕A masklike device placed over the mouth and nose and through which oxygen is supplied from an attached storage tank.氧气面具：象面具的一种置于嘴和鼻子上的装置，通过它氧气可以被从与之相连的贮存罐所提供美国传统 |
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