life-saver
noun[C]
uk/ˈlaɪfˌseɪ.vər/us/ˈlaɪfˌseɪ.vɚ/life-savernoun[C](HELP)
someone or something that gives you a lot ofhelpwhen you are in a verydifficultsituation
救命之人；救星；救命之物
When you'restuckintraffic, amobilephone's anabsolutelife-saver.当你遇到交通堵塞的时候，手机真成了救星。
life-savernoun[C](WATER)
Australian English
apersonon abeachor at aswimmingpoolwhosejobis to makecertainthat theswimmersaresafeandsavethem if they are indanger
救生员
Compare
lifeguard