The "hat" distinguishes symmetry operations from symmetry elements . “帽号”用来将对称操作与对称元素区别开。
2.
The rule of combination of symmetry operations is successive performance of them . 对称操作的组合规则，是逐次地去运用它们。
3.
Symmetry operations are geometrically defined ways of exchanging equivalent parts of a molecule . 对称操作几何上定义为交换分子中等价部分的方式。
4.
inspection of the molecule shows that no other symmetry operations besides these six are possible. 考察分子，除了这六个对称操作以外没有其它对称操作了。
5.
< uk > inspection of the molecule shows that no other symmetry operations besides these six are possible . < / uk > < uk >考察分子，除了这六个对称操作以外没有其它对称操作了。 < / uk >
