life buoy
Water
ˈlife ˌbuoy noun [countableC] 
TTWa large ring made out of material that floats, which you throw to someone who has fallen in the water, to prevent them from drowning 救生圈- lead sb astray
- lead sb by the nose
- lead sb on
- lead sb up the garden path
- lead singer
- lead singer/guitarist etc
- lead somebody a merry old a right old dance
- lead somebody a merry old dance/a right old dance
- lead somebody a merry old dance right old dance
- lead somebody astray
- lead somebody by the nose
- lead somebody on
- lead somebody up the garden path
- lead-story
- lead story
- leadstory
- lead the charge
- lead the eye
- lead the life of Riley
- lead-time
- lead time
- leadtime
- lead times
- lead-times
- lead up