towing ['təʊɪŋ]

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附加级

v.拖，拉，拽( tow的现在分词 )；拖带

a car towing a trailer with a boat on it 拖着一辆载有小船的拖车的小汽车
The tug is towing three barges. 那只拖船正拖着三只驳船。来自《简明英汉词典》