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心理学教授普罗菲特和克洛里,曾先后做过下面三个实验:第一个实验:他们将两组实验对象带到陡峭的大山前,让一组实验对象背上沉重的背包,
Psychology professor ProTex and Clourry, has done the following three experiments: The first experiment: They will be two groups of subjects to steep mountain, so that a group of subjects back heavy backpack,