The concept of regular expressions (regexps) -a notation for describing a pattern that matches a set of strings-is common across many programs and languages.
2
当这个应用程序显示一个约会列表时，它检测那些无效记录的字符串模式，然后跳过它们。
As the application displays a list of appointments, it detects the string pattern of those invalid records and skips them.
3
它是一种形式模式，一个特定程序使用名为模式匹配的识别流程在文本或字符串中进行查找。
It is a formal pattern that a specific program looks for in text or a string of characters using a recognition process called pattern matching.
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