primary file

基本解释

where "doclet.toc.xml" is the primary file.
“doclet.toc.xml”是最主要的文件。
The primary file is unavailable. It must be restored or otherwise made available.
主文件不可用。必须还原该文件或用其它方法使之可用。
Recent applications have adopted XML as their primary file format but older applications rely on other formats, so you often end up with a mixture of data in new and old formats.
最近的应用程序已将 XML 作为其主要的文件格式，而比较旧的应用程序依赖于其它格式，因此您最终常常得到新旧格式混合的数据。

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