英语翻译用英语翻译以下的世博英语句子：1、上海世博会的吉祥物是2007年12月18日正式揭晓的.2、世博会的历史比奥运会

1、上海世博会的吉祥物是2007年12月18日正式揭晓的.
The mascot of the Shanghai World Expo was formally announced on December 18,2007.
2、世博会的历史比奥运会的历史长45年.
The history of the World Expo is longer than that of the Olympic Games by forty-five years.
3、迄今为止举办世博会最多的国家是美国.
Up till now,the country which has held the World Expo for the most number of times is USA.
4、最早在世博会上获奖的中国产品是荣记湖丝.
The earliest award-winning Chinese product at the World Expo was RongJiHu Silk.
5、第一届世博会是1851年在英语伦敦举办的.
The first World Expo was held in London,England,in 1851.
6、上海世博会志愿者主口号.
The main slogan of volunteers of the Shanghai World Expo.
7、上海世博会志愿者副口号.
The auxillary slogan of volunteers of the Shanghai World Expo.
8、上海世博会是第41届世博会.
The Shanghai World Expo is the 41st World Expo to be held.
9、上海世博会前一届是2005年在日本爱知举行的.
The previous World Expo prior to the Shanghai World Expo was held in Aichi,Japan in 2005.