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Wen Zicong, from Guangzhou Zhiyong High School, displays his dual-use cart, which can also be used as a chair, in Geneva, Switzerland, on April 6, 2011. [Photo/Xinhua] |
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Junior high students from Taiwan display a phototaxis inductor, which can automatically be drawn to light and be used with a solar battery, in Geneva, Switzerland, on April 6, 2011. [Photo/Xinhua] |
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