life preserver造句

1、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。

2、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。

3、The life preserver kept him up until the boat came.
救生衣使他保持浮在水面直到小船来救他。