urban transportation的用法和样例：
例句
- The level of motorization is the important symbol to transportation, especially to urban traffic.
机动化水平是交通运输，尤其是城市交通发展的重要标志。 - Compared with cities in eastern China, infrastructures in many cities in western China are poor, and urban transportation in those cities must be speedily improved.
与东部地区城市相比，我国西部地区许多城市基础设施条件较差，城市交通运输亟待改善。
