radio-controlled buoy

例句：

1. 1. The radio-controlled buoy was used to guide the boats through the narrow channel.
   这个遥控浮标被用来引导船只穿过狭窄的航道。
2. 2. The buoy was a crucial part of the navigation system, providing direction and safety for the ships.
   这个浮标是导航系统的关键部分，为船只提供方向和安全。
3. 3. The buoy was designed to be easily deployable and retrievable, makingit a popular choice for recreational boaters.
   这个浮标设计得易于部署和回收，因此成为休闲垂钓者的首选。