由于Record是显式定义的分组，因此File将是一个隐式分组。
Since the Record is an explicitly defined group, the File will be an implicit group.
定义一组总是隐式地作用于模板引擎的变量列表。
This is a list of variables that are always implicitly assigned to the template engine.
定义一组总是隐式地作用于模板引擎的变量列表。
This is a list of variables that are always implicitly assigned to the template engine.
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