县改市的英文：
county upgraded to city
n. 郡；县
He is the lone doctor in the county.
他是县里唯一的一个医生。
The state was split into many counties.
邦又分成了许多县。
He served as a county magistrate in the Teng County of Shandong Province.
他曾经作过山东滕州知县。
n.
1.上坡
2.升级；提高品级（或标准）
ad.
1.往山上，上坡
v. [T]
1.使升级；提高；提升
2.以高档货的价格出售（低档货）；提高...的价格
Companies need to upgrade servers.
公司需要对服务器升级。
He was upgraded to security guard.
他被擢升为保安。
The first is upgrading our infrastructure.
首先，我们要改善我们的基础设施。
n. 都市，城市；特许市；全市居民；伦敦商业区；充满...的地方
the city of York
约克特许市.
beleaguer a city
围攻一座城市
The cleanliness of European cities puts our cities to shame.
欧洲各城市的整洁使我们的城市相形见绌。