bidirectional line

例句：

1. 1. The new communicationsystem uses a bidirectional line to transmit data between two cities.
   新的通信系统使用双向线路在两个城市之间传输数据。
2. 2.The bidirectional line is crucial for the efficient operation of the power grid.
   双向线路对于电网的高效运行至关重要。
3. 3.The engineers were able to install a bidirectional line that could support both directions of traffic.
   工程师们能够安装一条双向线路，既能支持交通的双向流动。