第三人称复数：lifesavers
1. 救生圈：James和Charles针对在这类设备上讨生活的程序员所撰写的这本书,如果算不上救生圈(lifesaver),起码也是节约时间的法宝(timesaver). 作者以简洁有力的方式把握了计算机领域中大多数古老而不可或缺,但非显而易见的内存节约技术.
2. 井架工安全带：lifelines of the national economy 国民经济命脉 | lifesaver 井架工安全带 | lifesaving equipment 救生设备
3. 救生者：lifer 无期徒刑犯 | lifesaver 救生者 | lifesaving 救命的
4. 救生员：lifeguard救生员 | lifesaver救生员 | markings标志线
1. （常指在健康方面）帮助解除困境之物
If you say that something is a lifesaver, you mean that it helps people in a very important way, often in a way that is important to their health.
e.g. The cervical smear test is a lifesaver.
宫颈涂片检查能够帮上大忙。
1. WASHINGTON - High gas prices could turn out to be a lifesaver for some drivers.
2. It first needs to be deactivated and purified, to modify it from a mini killer into a mini lifesaver.