a class by randomly
一班由随机选出
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Totally 485 undergraduates randomly selected from Fuling Normal University were tested by taking one class as a unit to evaluate the tendency of self-perfection in undergraduates.
对随机选取涪陵师范学院在校大学生485人作为被试对象以班为单位团体施测，评定其大学生自我完美主义倾向。
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