transobuoy

例句：

1. 1.The boat was anchored to the transobuoy at the river's edge.
   船被锚定在河边的浮标上。
2. 2.The fisherman used a transobuoy to mark his fishing spot.
   渔民用一个浮标来标记他的捕鱼地点。
3. 3. The transobuoy was a crucial part of the navigation system.
   浮标是导航系统的关键部分。