硅酸铝纤维致癌:The city's importance as a financial center has evolved slowly这句怎么翻译

I'd never been to Lhasa, but that's the city _____ it's very nice of you to show me around the city The city's importance as a financial center has evolved slowly这句怎么翻译 it's the first time you visit this city,________? The city's breaking down on a camel's back什么意思啊？怎么是camel's back?怎么理解？ The city has decided to do away with all the old building s in its centre the Forbidden City是什么意思 The cashier's the city is so empty ? The city is full__________ noises.