W — a word character (a through z, a through z, 0 through 9, and underscore).
w——单字字符(a到z、a到z、0到9以及下划线)。
A word character is any letter, decimal digit, or punctuation connector such as an underscore.
任何字母、十进制的数字或标点符号连接器如下划线的单词字符。
A word character is any letter, decimal digit, or punctuation connector such as an underscore.
任何字母、十进制的数字或标点符号连接器如下划线的单词字符。
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