词语

下行中国铁路部门规定列车行驶方向跟上行(朝向北京)相反叫下行。英down;公文由上级发往下级。例文书下行直省。——清方苞《狱中杂记》英(of a document) be issued to the lower levels;船从上游向下游行驶。英downriver; downstream;