今天我们一起来看看怎么用美语聊火车旅行。Economy, business, first class seat 经济、商务、头等座 The trains in the US are just like the planes. There are economy, business, and first class seats. 美国的火车和飞机一样，分为经济、商务、头等座。 sleeper car 卧铺车厢 Usually you would reserve a sleeper car if you take a midnight train. 如果你坐夜车的话，通常会订个卧铺车厢......