滚上滚下roll: vt. 1.滚,转,推滚(桶、车轮等),使(烟、尘土)滚 ...off: adv. 1.〔运动〕向那边,隔开。 be off 走, ...roll on roll-off container: 滚装集装箱roll-on roll-off: 滚装船; 开上开下法roll-on roll-off berth: 开上开下泊位下载手机词典可随时随地查词查翻译