我祖母呼吸困难，因此她需要靠氧气罐辅助。

My grandmother has trouble breathing, so she has an oxygen tank.

youdao

如果我需要水，我就得自己造。幸好，我知道造水的配方：来点儿氢气，加点儿氧气，再把它们点燃。

If I want water, Ill have to make it from scratch. Fortunately, I know the recipe: Take hydrogen. Add oxygen. Burn.

youdao

我船机舱失火，需要氧气面罩和泡末灭火器等消防设备。

My engine-room is on fire, and requires breathing apparatus, fire extinguishers, etc, to fight the fire.

youdao