有一天， 甘地走上已开动的火车， 所穿的一只鞋子掉到铁轨上。
While boarding a moving train one day, one of Gandhi's shoes slipped off and fell on the track.
离我的火车开动还有两个小时。
根据以前所有的例子，一旦这种模式的火车开动了，就很难改正方向。
In every prior case, once the train gets rolling, it has been very difficult to correct course.
应用推荐