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什么是世博会?世博会是世界博览会的简称,这是一项世界性的非贸易性的大规模的产品展示和技术交流活动。举办世博会必须由主办国申请,经世博会
What is the World Expo? Expo is the abbreviation of the World Expo. It is a worldwide non-trade-oriented large-scale product display and technology exchange activity. The hosting of the World Expo must be submitted by the host country and