flag buoy

• 带旗浮标

flag buoy的用法和样例：

例句

1. A buoy marked the entrance to the anchorage.
   停泊处的入口有一个浮标作标记。
2. At turns, everybody bunches up as close to the buoy as they can.
   在转弯的地方，大家都尽可能往浮标的地方挤。