1　ｃｒｙｓｔａｌ(晶体 )一词的由来原子以一定的方式排列 ,使得固体具有确定的对称性。古希腊人看到的关于对称的最佳事例 ,就是霜或雪花形成的图案。表示“霜”的希腊词为ｋｒｙｏｓ,因此古希腊人就把这种冰雪构成的图案称为ｋｒｙｓｔａｌｌｏｓ。冰的另一种特征就是透明。 The origin of the word “crystal” is arranged in such a way that the solids have a definite symmetry. The best example of symmetry seen by ancient Greeks is the pattern of frost or snowflake. The Greek word for “frost” is kryos, so the ancient Greeks called this pattern of ice and snow as krystallos. Another feature of ice is transparency.