monorail circuit

例句：

1. 1. The monorail circuit is apopular mode of transportation in many cities.
   单轨铁路电路是许多城市中流行的交通方式。
2. 2. The monorail circuit is an efficientway to get around the city center.
   单轨铁路电路是一种高效的方式来市中心地区移动。
3. 3.The monorail circuit has been improved significantlysince its introduction.
   自从引入以来，单轨铁路电路已经显著改进了。