Many applications include font substitution features that choose the closest possible match if the specified font is not installed.

许多应用程序包括字体替换功能，如果指定的字体没有安装会选择尽可能密切配合的字体。

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Whatever names they use, they all match the path expression based on their substitution group head element.

不管使用哪个名称，它们都匹配基于它们的代替组head元素的路径表达式。

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The \zs before the .* causes the substitution to pretend that the match only started after the colon, so only the actual timestamp is replaced.

在 .* 之前的 \zs 会导致这个替代看起来只是从冒号后开始匹配，所以只有实际的时间戳被替换。

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