城市交通问题的英文怎么说

4次大中小

城市交通问题的英文：
urban transport problems

urban是什么意思：
adj. 城市的；住在都市的；具有城市特征的

Urban life brought urban refinements: newspapers and periodicals, libraries, clubs and societies.
都市生活带来了都市的文化享受：报纸、杂志、图书馆、俱乐部、社交团体。

Urban infrastructure facilities have improved considerably
城市基础设施有了很大改观。

urbanized industry was limited primarily to the Northeast
城市工业主要局限于东北部。

transport是什么意思：
v. 运输，运送；使身处他境；流放；使狂喜
n. 运输，运送；交通工具；运输工具；运输系统；狂喜；流放犯

To transport by boat.
用船运输

transportation leakage
运输漏损量

He was sentenced to transportation for life.
他被判处终身流放。

problems是什么意思：
n. 难题，困难；逻辑题

It was a complex problem.
这是一个复杂的问题。

Is the problem that easy?
问题有那么简单吗?

This is a prime problem.
这是一个有关质数的问题。