life buoy（救生圈）是什么意思？音标发音+图解场景

救生圈 /ˈlaɪf ˈbɔɪ/ n

English: life buoy · 救生圈

释义：Ring made of buoyant material that is thrown to anyone who has fallen overboard to help them float.

这个词出现在以下图解场景（2）

水翼船 救生设备