"Waiting for a train" 可以用英语表示为 "waiting for a train"。
来源：这是一个简单直白的表达方式，表示一个人正在等待火车。
例句：
I've been waiting for a train for half an hour already.
我已经等了半小时的火车了。
She spends her weekends waiting for a train at the station.
她的周末都在车站等火车。
We'll have to wait for a train to take us to the next city.
我们得等一辆火车带我们去下一个城市。