在无序区域，水分子之间更为紧密，使他们的密度比以四面体结构排列的区域高。
Inthe disordered regions, water molecules are more closely packed, makingthem denser than regions where the molecules are arranged in atetrahedral structure.
根据传统观点，液态的水分子也是类似排列，尽管不那么严格，额外的分子会被包进四面体孔隙里。
According to the conventional view, liquid water has a similar, albeitless rigid, structure, in which extra molecules can pack into some ofthe open gaps in the tetrahedral arrangement.
一个水分子的形状是这样的：相邻地四个水分子组成一个金字塔形的四面体。
The shape of a water molecule is such that each H2O molecule is surrounded by four neighbours arranged in the shape of a triangular pyramid - better known as a tetrahedron.
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