“涂鸦是一种当人们觉得无法公开表达自我时所采取的方式。” 伯林格林州立大学的流行文化教授乔伊·奥斯汀这样说。

“Graffiti is a way for people to express themselves when they don’t feel they can do so publicly,” says Joe Austin, a professor of popular culture at Bowling Green State University.

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鲍林格林：美国俄亥俄州西北部一城市，位于托利多西南偏南。鲍林格林州立大学（创办于1910年）座落于此。人口28，176。

A city of northwest Ohio south-southwest of Toledo. Bowling Green State University (established 1910) is located here. Population, 28,176.

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“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.

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