upper end buoy

例句：

1. 1. The ship's upper end buoy was used to guide the vessel through the rough waters.
   船上的上端浮标用来引导船只穿过汹涌的水域。
2. 2. The research team set up an upper end buoy to collect data from the surface of the lake.
   研究团队设置了上端浮标来收集湖面的数据。
3. 3. The upper end buoy was designed to prevent ships from hitting each other in the busy shipping lanes.
   上端浮标被设计成防止船只在繁忙的航运通道中相互碰撞。