These two issues caused by the consequences make students no hands-on experiments to test . With the lack of the interest, the effects of experimental teaching greatly reduced.

这两个问题造成的后果就是学生不能亲自动手进行实验，对实验缺乏兴趣，实验教学的效果大大降低。

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And in fact, an example of a methodological attempt was done by Henry Gleitman at University of Pennsylvania, who built a tickle machine, which was this box with these two giant hands that went "r-r-r-r."

实际上,宾夕法尼亚大学的亨利·葛雷曼,曾经进行过研究方法上的尝试,他发明了一台挠痒痒的机器,这是一个装有两只大手的箱子,双手会不停的去挠痒痒

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