Enclosed Alphanumerics 封闭式字母数字 ; 带圈和括号的数字与字母
FF Enclosed Alphanumerics 圈型字母数字 ; 括号字母数字
blast through alphanumerics 增亮全部文数字
TUBE TYPE: This may be one, two, or three alphanumerics or symbols.
管型：这可能是一个，两个或三个字母，数字或符号。
By default, it matches only sequences of "keyword" characters (alphanumerics and underscore), and it has no deep sense of context beyond matching what's immediately to the left of the cursor.
默认情况下，它仅匹配“关键字”字符序列(数字、字母和下划线)，除了与光标左边进行匹配之外，它对上下文没有深刻的理解。
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