帮我用英语翻译：2010年世博会在中国上海开幕,两百多个国家和世界组织,国内七千万人参加

The 2010 world exposition was held in shanghai, china. More than 200 countries and international organizations and two thousand Chinese have taken in it's opening ceremany.

2010 world expo in Shanghai, China, 200 countries and the world organization, domestic 70 million