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公元1777年的一天,法国科学家D 布丰(D．Buffon 1707-1788)的家里宾客满堂,原来他们是应主人的邀请前来观看一次奇特试验的。试验开始,但见年已古稀的布丰先生
One day in 1777 AD, the French scientist D. Buffon (1707-1788) was full of family guests. It turned out that they had come to watch a peculiar experiment at the invitation of his master. The trials began, but Mr. Buffon, who had become old