lifesaver
noun /ˈlaɪfseɪvə(r)/
/ˈlaɪfseɪvər/
- a thing that helps somebody in a difficult situation; something that saves somebody’s life
救助物；救命物 - The new drug is a potential lifesaver.
这种新药有可能成为一种救命药。
- The new drug is a potential lifesaver.
- (also surf lifesaver)(Australian English, New Zealand English)(also lifeguard British and North American English)a person who is employed at a beach or a swimming pool to rescue people who are in danger in the water
（海滩或游泳池的）救生员