lifesaver

'laifseivә

托福

n an attendant employed at a beach or pool to protect swimmers from accidents
n a life preserver in the form of a ring of buoyant material

n. 救命者, 救生员, 济急的人

41,805

BNC 频率

22,409

使用频率

lifesaver 由 life（生命）和 saver（拯救者）两个部分组成，表示拯救生命的人或物。

例句

1. The teacher was a lifesaver during our exam preparations.

老师在我们考试复习期间真是个救星。

2. My friend brought me coffee when I was tired, and it was a real lifesaver.

我朋友在我疲惫的时候给我带来了咖啡，这真是个救星。

3. Knowing how to swim can be a lifesaver in an emergency.

学会游泳在紧急情况下可能是个救星。