underground ramp development system

例句：

1. 1.The underground ramp development system is designed toimprove traffic flow and reduce congestionin urban areas.
   地下坡道发展系统旨在改善城市地区的交通流量并减少拥堵。
2. 2.The underground ramp development system has been agame-changer for the transportation industry.
   地下坡道发展系统对交通运输行业来说是一个革命性的改变。
3. 3. The undergroundramp development system is beingtested in several cities across thecountry.
   地下坡道发展系统在全国几个城市进行测试。