free generator

例句：

1. 1. The free generator is a device that generates electricity without the use of fuel.
   自由发电机是一种在没有燃料的情况下产生电力的设备。
2. 2. The free generator has been used in many industrial applications to reduce energy consumption.
   自由发电机在许多工业应用中被使用，以减少能源消耗。
3. 3. The free generator is an environmentally friendly alternative to traditional power sources.
   自由发电机是与传统电源相比的环保替代品。