atomic expression的意思|示意

The above expression combines character groups, greedy operators, back-tracking, and atomic groups to match nested tags.

以上表达式综合运用了字符分组，贪婪操作符、回溯，以及最小化组团来匹配嵌套标签。

Note that a single atomic business rule may manifest as a number of formal rule statements, each with a different formal expression type.

注意，一个原子业务规则可能以多个规范化规则语句的形式出现，每个规范化规则语句具有不同的规范化表达类型。

Grouping is indicated by parentheses: any sub-expression contained in parentheses is treated as if it were atomic for the purpose of further grouping or repetition.

由括号表示分组：括号中包含的任何子表达式都被看作是用于以后分组或循环的原子。