短語詞組短語Swam downriver 曏下遊遊泳;順流獨木舟賽downriver channels 下行通道downriver ventilation 下行風downriver boat 下水船downriver downstream 船從上遊曏下遊行駛downriver lower 下遊的downriver channel 下遊河道downriver area 下遊區(qū)Huaihe River downriver 淮河下遊 返回 downriver