Ten years ago, when the first NEWSWEEK list based on college-level test participation was published, only three of the top 100 schools had graduating classes smaller than 100 students.

十年前，《新闻周刊》发布了第一份基于大学水平考试参与度的排行榜，当时排名前100位的学校中，只有三所学校的毕业班学生人数少于100人。

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You will usually find at least one relation per model class, starting from a relation that relates the top-level model classes.

通常你会在每个模型类中找到至少一个关联，从联系顶级模型类的关联开始。

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Also note that class definitions must appear at the top level of a module, meaning they cannot be nested classes (classes defined inside other classes or functions).

另外要注意，类定义必须出现在模块的最顶层，这意味着它们不能是嵌套的类(在其它类或函数中定义的类)。

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