auto-transformer starting

例句：

1. 1. The auto-transformer started the new machine.
   自动变换器启动了新机器。
2. 2. The engineer used the auto-transformer to start the engine.
   工程师使用自动变换器来启动引擎。
3. 3. The auto-transformer was responsible for starting the lights in the factory.
   自动变换器负责启动工厂的灯光。