上行

• The going was very hard over this mountain road .
  在这山路上行走很吃力。
• We ran out of juice on the motorway .
  我们在高速公路上行驶时汽油用完了。
• Do not walk on the wet cement .
  不要在湿水泥上行走。
• Boats sail on the water .
  船在水面上行驶。
• Tomorrow would be his last run on the mill creek line .
  明天将是他最后一次在密耳科立克线上行驶。
• Trains run on rails .
  火车在轨道上行驶。
• For an hour they moved along vast desolated plain .
  他们在一片满目荒败的广漠平野上行驶了足有一个钟头。
• Violence, on the field and in the stands, dogged soccer's heels .
  赛场上动作粗野，看台上行凶斗殴的现象却在足球比赛时连连发生。
• More services become economically feasible when large numbers of people are crowded into cities .
  由于大量人口涌向城市，兴办更多的服务项目在经济上行得通了。