When he was a young boy he stowed away on a merchant ship headed for China.他还是个小孩时，曾偷乘一艘开往中国的商船。This merchant ship was convoyed by a destroyer.这只商船由一艘驱逐舰护航。Their merchant ship was reflagged last year.他们的商船去年改变了注册国。A strong side wind caused the merchant ship to lie along.一股强劲的侧风使商船朝一边倾斜。