据阿莫·斯特学院心理学教授凯瑟琳·桑德森称，研究显示，夏季恋情经常发生。

Research shows summer romances to be very common, according to Catherine A. Sanderson, psychology professor at Amherst College.

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弗吉尼亚大学的心理学教授丹尼尔·威灵汉博士的研究显示重复增加了成功的可能性。

Research by Daniel Willingham, Ph. D. , a psychology professor at the University of Virginia, showed that repetition increases the probability of success.

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弗吉尼亚大学的心理学教授丹尼尔·威灵汉博士的研究显示重复增加了成功的可能性。

Research by Daniel Willingham, Ph.D., a psychology professor at the University of Virginia, showed that repetition increases the probability of success.

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There is a lot of research in psychology, a lot of evidence that shows how difficult change is.

心理学的研究有很多，很多证据显示，改变是非常困难的事。

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