main line

n

• ① 1铁路干2【美】干线道路
  • The advantage of that city is that it's on the main line and you can get to London in twenty-five minutes.那个城市的好处是它位于铁路干在线,从那里到伦敦只需时二十五分钟。
  • He took a cab straight to the main line station.他乘坐出租车直奔干线道路车站。

• ② 【俚】(麻醉药的)静脉注射