Definition: trains as a method of transportation Level: B1
很多人乘火车去城里。
Many people travel to the city by ___rail.
新的铁路服务现在连接着这两座城市。
New ___rail service now connects the two cities.
如果你从波士顿来，就坐火车吧。
If you're coming from Boston, travel by ___rail.
