lifebuoy

美 [ˈlaɪfˌbɔɪ]
英 [ˈlaɪfˌbɔɪ]
  • n.救生带;救生圈
  • 网络卫宝;卫宝香皂;救生衣
复数:lifebuoys  
lifebuoy
n.
1.
救生带;救生圈a piece of material that floats well, used to rescue sb who has fallen into water, by keeping them above water