urban troubles的用法和样例：
例句
- Urban problems revolve around meeting the needs of the existing inhabitants and replacing old and obsolete facilities, especially housing.
城市问题应考虑满足现有居民的需要以及更换那些老式而陈旧的设施，尤其是住宅。 - A number of discussion sessions are scheduled throughout the course to further address the critical and paradigmatic architectural and urban issues.
为了深入讨论重要的和举例说明的建筑和城市问题，在整个课程之中将安排数次讨论课。
