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Science has already proved that sunny days can lead to sunny dispositions, helping improve a person's mood, intelligence and memory -- and researchers in China have now shed light on why. 科学已经证明，晒太阳能让人的个性也变得阳光，有助于改善心情、激发才智，提高记忆力--我国研究人员如今揭示了其中的原理。 A team at the University of Science and Technology of China in Hefei, Anhui province, discovered that ultraviolet light -- an element of sunshine -- activates a change in the brain that can make us smarter. 位于安徽合肥的中国科技大学的研究团队发现，阳光中的紫外线能激活大脑中的变化，从而使人们变得更加聪明。 Tests on mice showed that moderate exposure to UV light enhances perception and learning, according to Xiong Wei, a professor at the university's School of Life Sciences who co-led the study. 据牵头这项研究的中国科学技术大学生命科学学院的熊伟教授表示，对小鼠的试验表明，适度暴露在紫外线下可以增强感知和学习能力。 | 
