英语翻译
Firstly,the bid theme.Shanghai's bid theme was"Better City,Better life".The theme of "City" had never been adopted in the 152-year history of World Expo and it also fits in well with the phenomenon of urbanization that accompanies the golbal economy inergration now occurring.Urbanization is a result of human civilization,but it can also generate serious problems.On one hand,we must recognize that urbanization is an irreversible phenomenon because according to UN estimates,by 2020,65% of the world's population will live in cities.