trawl buoy

例句：

1. 1. The fisherman used a trawl to catch the large schools of fish.
   渔民使用拖网捕捉大群的鱼。
2. 2.The trawl was designed to detect underwater objects.
   拖网设计用来探测水下物体。
3. 3. The trawl buoy helped the fisherman to locate their nets more easily.
   拖网浮标帮助渔民更容易地定位他们的渔网。