基本解释下行(南下)船舶同根派生 downbound相关词英汉例句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)運量downbound exit 下行(水)出牐時間downbound entry 下行(水)進牐時間downbound tows 下行(頂推)駁船隊downbound更多例句