1.life-sustaining 维持生命的

Our lungs fuel us with oxygen, the body's life-sustaining gas.
我们的肺给我们泵入氧气，我们维持生命的气体Y1#+d*#=(Y]s。

2.bring back to life 使复活

Hospitals are places of great triumphs – when the seemingly dying are brought back to life.
医院是取得重大胜利的地方，那些似乎垂死者被抢救回来^Ow;b@~+%DsTCWR~9]F。