a large town

Many of the world's cities have populations of more than five million. 世界上许多城市的人口超过500万。

Wellington is the capital city (= centre of government) of New Zealand. 惠灵顿是新西兰首都。

any town in the UK that has a cathedral (= large, important church)

The city of Ely has about 15,000 inhabitants. 伊利市有大约1万5千居民。

the government of a city

It's the city's responsibility to maintain the pavements. 维护人行道是市政府的责任。

My father works for the city. 我父亲为市政府工作。

the business centre of London where the large financial organizations are, such as the Bank of England

He works in the City. 他在伦敦商业中心上班。

a City analyst 伦敦商业区分析师