扩展字典文件来识别成百上千的单词将大大降低简单数字和字符匹配的效率。
Expanding the dictionary file to recognize hundreds of thousands of words will drastically reduce the effectiveness of the simple number and letter matching.
c文件扩展名是一种文本模式，它仅匹配点号加小写字母c的情况。
The.c file name extension is a literal pattern that matches only a period followed by a lowercase c.
清单 4 中所示的结构由 mimeokay 函数使用，用来实现以下用途：将全局字符串指针 fstr 设置为与文件扩展名 fext 相匹配的合适的 MIME 类型。
The structure in Listing 4 is used by the mimeokay function for one purpose: to set the global string pointer fstr to the appropriate MIME type string matching the file's extension: fext.
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