1. A life preserver shaped like a ring. 
   救生圈圈状救生用具
2. Tried to catch at the life preserver. 
   试图抓住救生用具
3. a life preserver in the form of a ring of buoyant material. 
   圆圈形的有浮力的生命保护者。
4. a life preserver consisting of a connected pair of inflatable bags that fit under a person's arms and provide buoyancy; used by children learning to swim. 
   由一截连在一起的充气袋子组成，能放在人的胳膊底下提供浮力；用于学水的儿童。
5. The extremely arid desert climate is the best preserver of murals. 
   极端干燥的沙漠气候是壁画的最好保存者。

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