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Various activities held across China to greet annual day for science popularization

Xinhua | Updated: 2018-09-16 07:17
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Children experience acoustics devices during a science popularization activity in Langfang, North China's Hebei province, Sept 15, 2018. A variety of activities were held across the country to greet the annual day for science popularization in China. [Photo/Xinhua]
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