a powerful small boat designed to pull or push larger ships
towboat的用法和樣例:
例句
用作名詞 (n.)
For example, permits could be issued to travel through locks at specified times, and those permits could be traded among towboat captains. 比如,可以通過許可證的發放將船閘通行限定在指定時間內,而且許可證也可以在拖船船長之間進行交易。