常見(jiàn)例句a downbound channel; the downbound train. 下行的水道；下行的火車。downbound commerce (=downbound traffic) 下行(下水, 南下)運(yùn)量downbound exit 下行(水)出牐時(shí)間downbound entry 下行(水)進(jìn)牐時(shí)間downbound tows 下行(頂推)駁船隊(duì) 返回 downbound