They would play ping-pong, and talk about probability theory, but they also devised a form of chess in which each player had to make his move while the other ran round the garden.
他们会一边打乒乓球,一边探讨概率论,他们还发明了一种下棋的方式,一个人走棋时,另一个人要在花园里跑完一定的圈数。
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