city : 一般指大城市或重要城市。
- Many of the world's cities have populations of more than five million.
- Wellington is the capital city (= centre of government) of New Zealand.
town : 一般指规模小的城镇，也指城市中的市区，有时也泛指城市。
- a seaside/coastal town
- a fishing/mining/industrial town
- He was born in the small town of Castleford, in Yorkshire.
- We stayed in the best hotel in town.
- the main road into/out of town