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English[en]
It is reasonable to suppose that the discovery was accidentally noticed that in some geographic areas, with some stones around the fire, those in contact with fire, altered their structure into dust, if united with the water, became a plastic paste, which then dry loses its plasticity and returned to have the rigidity of the original stone.
Chinese[zh]
可以合理地推测 发现石灰的偶然性 , 在某些地理区域,在火边的一些石头,因为与火接触,结构改变了,成为粉末状,在与水接触后就变成浆料状,风干后粘稠状态消失,又重新回到原来石头坚硬的状态。

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