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Passing Trains




Given an equal number of trains alternating in each direction, this is the only way your observation could be true over a long period.

假定相等数量的火车对开,在较长的一段时间你的观察结果只能是这样。

given an equal number of trains alternating in each direction: assuming an equal number of trains moving in each direction

There must be a shorter interval from each eastbound train to the next westbound one than there is from each westbound to the next eastbound.

每列东行车到下一列西行车的时间间隔一定短于每列西行车到下一列东行车的时间间隔。


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