He has to use an oxygen mask to help him breathe.

他必须戴氧气罩来帮助呼吸。

Oxygen masks dropped. The plane dropped for a few seconds before it stabilized again.

然后，氧气面罩脱落，飞机下降了数秒后才稳定下来。

If you are wearing a facemask, please remove it before putting on the oxygen mask.

如果您正戴着口罩，请在戴上氧气面罩之前将其取下。

They are even shown a safety demonstration and given a life vest and oxygen mask.

他们甚至还进行了一场安全演示，并分到了救生衣和氧气面罩。

Then you've got inexpensive hand-pumped oxygen masks, which could prevent a third of infant deaths.

然后，便宜的手泵氧气面罩可以防止三分之一的婴儿死亡。

One of the men placed an oxygen mask over the old cob's head and gave him some oxygen.

一个男人把氧气罩放到老雄天鹅的头上，给他吸氧。

He sent out a Facebook live video of himself and others on the plane putting on their oxygen masks.

他通过Facebook实况视频拍下了自己与其他乘客戴着氧气面罩的画面。

I'll wear a motor-cycle helmet, with an oxygen mask inside.

我会戴上摩托车头盔，里面有氧气面罩。

Passengers used oxygen masks and prepared for the force of landing.

乘客戴上氧气面罩，准备着陆。

Hypoxia, or lack of oxygen, can affect anyone at extreme heights. That is why passenger planes are equipped with oxygen masks.

任何人在非常高的地方都会出现缺氧，因此客机都配备了氧气面罩。