It means the control is a regular character and a ，则表示该控件为常规字符，而且将引发
2.
An escaped metacharacter has the behavior of a normal character 转义的元字符具有常规字符的行为。
3.
A normal character is any xml character that is not a metacharacter 常规字符为不是元字符的任何xml字符。
4.
There are two types of characters that are used in regular expressions : metacharacters and normal characters 正则表达式中使用以下两种类型的字符：元字符和常规字符。
5.
In regular expressions , a normal character is an atom that denotes the singleton set of strings containing only itself 在正则表达式中，一个常规字符是一个原子，它表示只包含其自身的单字符串集。
