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All are first class and all are objects.
它们都是第一级类，并且都是对象。
youdao
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Now that folders are first class objects, you can use them instead.
现在文件夹是第一个类对象，作为替代，你可以使用它们。
youdao
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Now that folders are first class objects, you can use them instead.
现在文件夹是第一个类对象，作为替代，你可以使用它们。
youdao