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在液体内部,每个分子在四面八方都有机会受到周围分子的吸引,和其它分子结合,但是液面的分子吃亏,它和周围的分子结合不完全,外侧接受不到其它分子的吸引力,因此表层的分子能量较高,比较“不安分”。液体为了降低能量,会尽量缩小表面积,力争形成球面的形状,这时就会呈现出一种
Inside the liquid, each molecule has the opportunity to attract the surrounding molecules in all directions, and other molecules, but the liquid molecules suffer, it is not fully integrated with the surrounding molecules, the outside can not accept the attraction of other molecules, so The higher the molecular energy of the surface, more “restless.” Liquid in order to reduce energy, will try to reduce the surface area, and strive to form a spherical shape, then it will show a