electrically operated stop semaphores

例句：

1. 1. The electronically operated stop semaphores were designed to improve traffic flow.
   电子操作的停止信号灯被设计来改善交通流量。
2. 2. The new electronically operated stop semaphores have been installed in the city's main roads.
   新的电子操作的停止信号灯已经在城市的主干道上安装。
3. 3.The electronically operated stop semaphores are essential for ensuring safe driving conditions.
   电子操作的停止信号灯对于确保安全驾驶条件至关重要。