求翻译：市化和机动化的发展，使城市人口和地域不断增加，对公共交通的需求相应快速增长，要求公共交通企业投入更多的客车。是什么意思？

Development of city and motorization, the urban population and increasing geographical, appropriate and rapid growth in demand for public transport, required public transport companies to invest more in passenger cars.