dual bus

例句：

1. 1. The dual bus system is designed to improve traffic flow and reduce congestion.
   双总线系统旨在改善交通流和减少拥堵。
2. 2.The dual bus system has been implemented in several cities around the world.
   双总线系统已在世界上几个城市实施。
3. 3.The dual bus system provides a more efficient way of transporting people between different locations.
   双总线系统提供了一个更高效的运输方式，用于在不同地点之间运送人员。