一看到lz题目就想到这歌了,uptown girl,西城男孩的这首歌的MV感觉可以给你一个比较直观的理解
朗文当代英英词典里这样说的,downtown:to or in the centre or main business area of a town or city uptown:in or towards an area of a city that is away from the centre,especially one where the streets have larger numbers in their names and where people have more money