can-buoy罐形灯浮;罐形浮标
can-buoy giving green flashes发射绿色闪光的罐形浮标
N（名词） a buoy with a flat-topped cylindrical shape above water, marking the left side of a channel leading into a harbour: red in British waters but green (occasionally black) in US waters 罐形浮标 [nautical] → compare nun buoy