勉强自己笑可以振奋精神：心理学家发现，即使你心情很糟，只要强迫自己笑出来，就会马上情绪高涨。
Forcing yourself to smile can boost your mood: Psychologists have found that even if you're in bad mood, you can instantly lift your spirits by forcing yourself to smile.
“笑是欢乐，是积极地参与生活，”鲍林格林大学（Bowling GreenUniversity）心理学教授亚普·潘克斯普（JaakPanksepp）说。
"It's joy, it's positive engagement with life, " said Jaak Panksepp, a Bowling Green University psychology professor.
心理学家对笑细心的研究余有十年，但是只停留在表面。
Psychologists have studied smiles carefully for decades, but.
西方喜剧美学理论主要包括两个方面，一是喜剧致笑机制的心理学阐释，二是喜剧作为一种艺术体裁在文艺理论上总结。
The aesthetic theory of western comedy includes two aspects: One is the psychological explanation of the laugh - making mechanism in comedy, the other is the theory summary of literature and art.
心理学家们现在发现：笑是人类与他人交流的最古老的方式之一，而在此之前，笑只被看作是人类幽默感的体现。
Psychologists have now found: Laughter is the exchange of human and the oldest person one way, but in the meantime, smiling only be seen as the embodiment of human sense of humor.
心理学家们现在发现：笑是人类与他人交流的最古老的方式之一，而在此之前，笑只被看作是人类幽默感的体现。
Psychologists have now found: Laughter is the exchange of human and the oldest person one way, but in the meantime, smiling only be seen as the embodiment of human sense of humor.
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