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。
An audit rule represents a combination of a user's identity and an access mask.
稽核规则是表示使用者之识别和存取遮罩的组合。
组合规律；
The rule of combination of symmetry operations is successive performance of them.
操作规则没有多少灵活性，所以谨慎操作是很重要的。
The rule of combination of symmetry operations is successive performance of them.
公司章程是一系列规定公司内部运作的规则。
The rule of combination of symmetry operations is successive performance of them.
公司章程是一系列规定公司内部运作的规则。
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