当我步入房间时，他正戴着氧气面罩。
我醒来时看到一个氧气面罩对我的鼻子。
我来为您示范一下氧气面罩的使用方法。
带上氧气面罩。
所以客机装备了氧气面罩。
That is why passenger planes are equipped with oxygen masks.
这个乘客夺取了氧气面罩。
戴上氧气面罩，从最近的紧急通道到达火场。
Draw on oxygen mask through the nearest agent channel to the fire spot.
若发生紧急情况，头顶上会降下一只氧气面罩。
An oxygen mask will come down from overhead in case of an emergency.
如果发生紧急情况，头顶上会放下一只氧气面罩。
An oxygen mask will come down from overhead in case of emergency.
这就是为什么航空公司要求你首先带上氧气面罩。
This is why airlines ask you to put on your oxygen mask first.
乖巧的小钦安静地躺在病床上，头部戴上了一个氧气面罩。
And well-behaved little Qinan lay quiet in bed, his head put on an oxygen mask.
如果遇到其它紧急情况时，会从头顶上方落下一个氧气面罩。
In case of any other emergency, an oxygen mask will come down from overhead.
拉下面罩会开启氧气流。
他们或通过防毒面罩，或携带沉重的氧气瓶进行呼吸。
They breathe through uncomfortable respirators or carry heavy oxygen tanks on their backs.
头盔内有氧气循环流动，除了供氧，还可以防止面罩雾化。
Oxygen is circulated around the helmet to stop the visor misting.
头盔内有氧气循环流动，除了供氧，还可以防止面罩雾化。
L Oxygen is circulated around the helmet to stop the visor misting.
让病患坐立，并用非再吸入面罩给予高浓度氧气。
A. sitting the patient up; giving high-concentration oxygen by non-rebreather mask.
让病患坐立，并用非再吸入面罩给予高浓度氧气。
A. sitting the patient up; giving high-concentration oxygen by non-rebreather mask.
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