life-saver
剑桥词典
life-saver noun [C] (HELP)
someone or something that gives you a lot of help when you are in a very difficult situation
救命之人;救星;救命之物
When you're stuck in traffic , a mobile phone's an absolute life-saver. 当你遇到交通堵塞的时候,手机真成了救星。
life-saver noun [C] (WATER)
Australian Englisha person on a beach or at a swimming pool whose job is to make certain that the swimmers are safe and save them if they are in danger
救生员
比较
lifeguard 返回 life-saver