underwater towed craft

例句：

1. 1. The boat was towed by a tugboat.
   这艘船被拖船拖走了。
2. 2. The car was towed away by the police.
   那辆汽车被警方拖走了。
3. 3. The boat was towed back to the dock.
   这艘船被拖回了码头。