verb · the act of pulling a ship or boat along with a rope or chain

在这种浅滩，有时需要人力在岸边拖船。

noun · a boat or barge that is being pulled by another vessel

几只载满货物的拖船紧随在动力船之后。

noun · a powerful vessel used for towing or pushing other ships

大货船在拖船的帮助下缓缓靠岸。