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十七世纪意大利数学家卡瓦列利(Bonaventura Cavalieri,1598—1647)在他的名著《用连续不可分量之新方法说明之几何》(1635)中提出: (1) 如果两个平面片处于两条平行线之间,并且平行于这两条平行线的任何直线与这
In the seventeenth-century Italian mathematician Bonaventura Cavalieri (1598-1647), in his famous book The Geometry Illustrated by New Methods of Continuous Incompressibility (1635): (1) If two planes are in two Any line between the parallel lines and parallel to the two parallel lines and this