a life preserver in the form of a ring of buoyant material

an attendant employed at a beach or pool to protect swimmers from accidents

frey believes that for uncommon house pets, facebook can be a lifesaver -- literally.

frey认为对对于那些不常见的宠物，facebook可能会是一个救星 —— 这点毫不夸张。

with cases of skin cancer rising, the skinscan application might prove to be a lifesaver – literally. the service helps users to analyze and keep a record of their moles.

随着皮肤癌的病例不断增加，皮肤检测的应用程式可能会是一个救命恩人—确实地。这项服务可以帮助用户分析和记录他们的痣。

the lifesaver for people who know what they want on the internet.

清楚自己在网上想要什么的人的好帮手。

mike : you could be my lifesaver and help me then.

迈克：不要笑，主题就是「怎样做演讲」。

mike : you could be my lifesaver and help me then.

迈克：你真是我的救命草，那么快帮帮我。

sanitation and hygiene: a cheap and highly effective lifesaver

缓解卫生与个人卫生是挽救生命的廉价且极为有效的方法

david wanted to be a lifesaver but he couldn「t swim!

戴维想当救生员，可他不会游泳！

tom :you could be my lifesaver and help me then.

汤姆：你真是我的救命草，那么快帮帮我。

nephrology and dialysis for your pda - free medical downloads can be a real lifesaver for many people.

肾脏透析你的pda和免费医疗，可以下载很多人真正救人。

layers were and are a lifesaver for any marginally complex design.

图层是一切较复杂设计工作的救星。

thanks for helping me move, you」re a real lifesaver !

感谢你帮我搬家，你真是我的救星。

this one is a lifesaver of sorts, with the compiler deducing the proper type for a variable from its initializer expression.

编译器能够根据变量的初始化器（initializer）表达式推导出正确的变量类型，这个特性可以节省时间。

opera may have a small market share, but its voice options can be a lifesaver for those with special needs.

opera有小部分的市场份额，但是其voice选项可能对有特殊需求的人来说是救命稻草