A visitor tries the water basin to learn about 皇冠体育app's ancient science invention during the 皇冠体育apptown festival in Vancouver, Canada, Aug 9, 2014. The 15th annual 皇冠体育apptown festival showcased both commercials and cultural activities presented from the Chinese community and brought about 60,000 visitors to experience the biggest multicultural summer celebration.[Photo/Xinhua]
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