拖轮

例句：

1. 1. Thetugboat was used to pull theheavy cargo out of the harbor.
   拖船被用来把沉重的货物从港口拖出。
2. 2. The tugboat was a crucialpart of the port's operations.
   拖船是港口运营中至关重要的一部分。
3. 3. Thetugboat was used to transport goodsfrom one side of the river to theother.
   拖船被用来将货物从河流的一边运到另一边。