What causes this so-called "return trip effect"?
那么，产生“返程效应”的原因是什么呢？
According to a study, the return trip effect is seen even when people take different routes on the outward and return trips.
有研究显示，出行和返回时采取不同的路线时还是会有“返程效应”。
To study the 'return trip effect', as it is called, they asked 20 men to take off their watches and view two films, ten minutes apart.
为了研究这一名为“回程效应”的现象，科学家让20人摘下手表，观看两部影片，影片间隔十分钟。
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