How does one give a finite description of a language if it contains infinitely many possible strings?

如何给一个语言一个有限的描述，如果该语言包含了无限多可能的字串？

youdao

How does one give a finite description of a language if it contains infinitely many possible strings?

如何给一个语言一个有限的描述，如果该语言包含了无限多可能的字串？

youdao