求翻译：引入真实或虚拟的案例，使学生发现所存在的问题是什么意思？

The case of the introduction of real or virtual, so that students found the problems

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Introduces real or the hypothesized case, causes the student to discover exists question

Case of introducing real or virtual, so that students see that the problems of

Introduce the true or fictitious case, make students find problems existed