One helpful step is to train lunchtime supervisors to distinguish bullying from playful fighting, and help them break up conflicts.

其中一个有用的步骤是培训午餐时间的监督人，让他们区分欺凌与嬉戏打闹，并帮助他们化解冲突。

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The big advantage of this system is that you don't have to break up the train into individual cars to do the work on one vehicle. The time saved reduces the period the train is out of service.

这种方法的最大优点就是在检修单独的车辆时不必进行解列作业，这样可以缩短列车的掉线时间。

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