N-COUNT (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. (常指在健康方面)帮助解除困境之物
The cervical smear test is a lifesaver.
宫颈涂片检查能够帮上大忙。
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