子规

The subrules in turn defines the actual details of the grammar.

子规则依次定义语法的实际细节。

Third, some elements component specifications have been clarified within this specification.

第三， 弌些子规范菂基础已经在本规范中得到阐述。

The subrule as an efficient version of the rule.

子规则是高效版的规则。

The subrule is not a panacea however.

但子规则并不是万灵药。

Inner sub rule groups can be nested by enclosing sub - group inside another set of parentheses.

内部的子规则组可以使用另外一对括号来封装以实现嵌套。