I've got 15 interns and students in groups of three, each student having been lectured about my pedagogical purpose and my superiority to the plastic torso down the hall.

我有十五个实习生和学生，他们共分三组，我给每个学生都讲了我的教学目的和走廊里塑料人体躯干的优越性。

youdao

In groups of three - one student from the home, school and play groups - students complete each other's questionnaires.

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