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世界博览会是一项由主办国政府组织或政府委托有关部门举办的有较大影响和悠久历史的国际性博览活动。它的历史源远流长,早在古代农耕社会便已
World Expo is an international event with a great influence and long history organized by the host government organization or the government commissioned by relevant departments. Its history goes back to ancient times, as early as ancient farming society