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1·These are known as Diploma Mills and are illegal in the United States.

这些项目被认为是文凭工厂，并且在美国是非法的。

2·But most students study at lacklustre public universities or at private diploma mills.

但大多数学生进的都是些毫无生气的公立大学，或者就是私立的“文凭工厂”。

3·So far we have talked about planning for school and about subjects like online education and diploma mills.

迄今为止，我们已谈论了择校计划以及有关诸如在线教育和文凭工厂之类的话题。

4·Diploma or degree mills come in many guises.

文凭或学位作坊总是以多种伪装的形式出现。