S the concepts behind all regular expression implementations.
抽象所有正则表达式实现背后的概念。
2
Regular expressions: search word (s) will be regarded as a regular expression (in keyword search words will be treated as a sequence of regular expressions).
正则表达式：搜索单词将作为一个正则表达式(在关键字搜索中，单词被视为正则表达式系列)。
3
And it is in the public schools that we find the full expression of society 's understanding-the knowledge, hopes, and fears that are passed on to the next generation.