吉林大学远程教育学院  
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Background Information |  Synopsis |  Warm-up activity |  Text | 


Passing Trains




The first train to pass is most likely to be eastbound, because the chance of your arriving during the period between a westbound and an eastbound train is three times as great. But you will have a much longer average wait in that case.

第一列开过的车很可能是东行车，因为你在西行车与东行车之间这一段时间到达路口的可能性要三倍于另一种可能性.但你所等待的平均时间也要长得多。


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