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。
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.
有关static关键字需要注意一点，它的工作方式与在非静态上下文中的工作方式不同。
One thing to note about the static keyword is that it doesn't work the same as how this works in the nonstatic context.
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