名词
中文翻译：电信号机
同义词：
['electric switch', 'electric relay例句：1. The electric signal machine is used to control the traffic lights.（电信号机用于控制交通灯。）']
例句：
-
1. The electric signal machine is used to control the traffic lights.
电信号机用于控制交通灯。
-
2. The electric signal machine was invented by a famous inventor.
电信号机是由一位著名的发明家发明的。
-
3.The electric signal machine is an important tool for monitoring and controlling the power grid.
电信号机是监测和控制电网的重要工具。