下行 1.[铁道] down; go down 下行列车 down train2.[航运] downriver; downstream 顺江[流] 下行的船舶 ships and boats sailed down the river3.(公文发往下级) to be issued to the lower levels
行车 行车train working; drive a vehicle◇行车安全 driving safety; 行车里程 mileage; distance travelled by a vehicle; 行车速度 running speed; 行车速率 driving speed; 行车执照 driver's license; driving license