该包提供了一个引擎，可以通过解释模式对字符序列执行操作，即模式成为正则表达式的编译表达式。
This package offers an engine that performs operations on character sequences by interpreting patterns, a pattern being a compiled expression of a regular expression.
Unicode字符集、模式内任意代码操作、flagtoggles、条件表达式以及其他特征都被添加到正则表达式库中。
Unicode character class specifiers, arbitrary code execution inside a pattern, flag toggles, conditional expressions, and many other features were added to the regular expression engine.
确定字符串是否与模式匹配是对正则表达式的最简单应用，如图1所示，而且易于操作。
Determining if a string matches a pattern is the simplest use of regular expressions and, as you see in Figure 1, it's, easy to do.
如果在CLP命令模式下使用了特殊字符，那么这些特殊符号将由操作系统shell解释。
If special characters are used in CLP command mode, they are interpreted by the operating system shell.
首先，从最主要的角度来看，函数的目的是“查找与第一个模式中的值匹配的字符串，然后通过将第三个变量作为要操作的字符串，以第二个模式替换匹配结果”。
First, in broadest terms, the function's purpose is to "match what is in the first pattern, then replace it with the second pattern, using the third argument as the string to operate on."
在使用like 操作符时，在Value框中直接输入字符串值并使用 % 字符作为文本模式的通配符。
To enter a String value using the like operator, type directly into the value field using the % character as a wild card for a text pattern.
左侧操作数为字符串表达式，右侧操作数为包含匹配所用模式的字符串。
The left operand is a string expression, and the right operand is a string containing the pattern to be used for matching.
左侧操作数为字符串表达式，右侧操作数为包含匹配所用模式的字符串。
The left operand is a string expression, and the right operand is a string containing the pattern to be used for matching.
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