2010上海成功举办了世博会，这对于上海经济的发展意义重大的翻译：Held for the 2010 Shanghai World Expo, which is great importance to the development of economy in Shanghai 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Successfully held the 2010 Shanghai World Expo, which Shanghai's economic development is of great significance

Held for the 2010 Shanghai World Expo, which is great importance to the development of economy in Shanghai

2010 Shanghai succeeded has held the World Expo, this regarding Shanghai economy development watershed

2010 Shanghai Expo was held successfully in Shanghai's economic development, and the significant

Held for the 2010 Shanghai World Expo, which is great importance to the development of economy in Shanghai