县城的英文：
county seat
county town

参考例句：

Build a Civilization County Seat
创建文明县城

The county town is a hundred li or so away from here.
县城离这有百儿八十里。

We should develop small towns on the Basis of existing county seats and of organic towns where conditions permit.
发展小城镇要以现有的县城和有条件的建制镇为基础.

I was fortunate to catch today' s last bus to the county at the last minute
我在最后一分钟赶上了今天最后一班去县城的长途车,真是幸运。

The motorist picked up a couple of pupils and took them as far as the county town.
开汽车的人让两个小学生上车，把他们一直带到了县城。

county是什么意思：
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。

seat是什么意思：
n. 坐具，座部，臀部，坐位，议会议员的选区，席位，中心，宅第
v. 就坐，坐下，可坐···人

They are standing by the seated figure of Shakespeare.
他们站在莎士比亚座像旁边。

There was a scramble for the best seats.
大家争抢最好的位置。

I want a aisle seat.
我要一个靠走道的座位。

town是什么意思：
n. 城镇，市镇；市民；市内商业区

That town is not blatant.
那座小城并不喧嚣。

The orphan floated from town to town.
那个孤儿在各个城市游荡。

Travelling from town to town,place to place,etc
从一城到另一城、从一地到另一地