1. For instance, the character class [: punct:] stands for all punctuation characters in the current locale.
例如,字符类[:punct:]表示当前语言环境中的所有标点字符。

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2. For instance, the character class [: punct:] stands for all punctuation characters in the current locale.
例如,字符类[:punct:]表示当前语言环境中的所有标点字符。

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