n.浮標；浮筒；救生圈；救生衣

v.使浮起；支持；鼓勵；用浮標指示

The can buoy was submerged underwater. 罐狀浮標沒于水下。

At turns, everybody bunches up as close to the buoy as they can. 在轉彎的地方，大家都盡可能往浮標的地方擠。

A tail buoy is connected to the far end of the cable. 電纜的末端與一個尾隨浮筒相連。

Take a life buoy with you when you go swimming. 下午去游泳的時候把救生圈帶上。

What makes the life buoy move? 什么東西使救生圈移動？