lifebuoy
noun /ˈlaɪfbɔɪ/
  /ˈlaɪfbuːi/,  /ˈlaɪfbɔɪ/
- a piece of material that floats well, often in the shape of a ring, used to rescue somebody who has fallen into water, by keeping them above water
 
| 单词 | lifebuoy | 
| 释义 | lifebuoynoun /ˈlaɪfbɔɪ/   /ˈlaɪfbuːi/,  /ˈlaɪfbɔɪ/ 
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