waste fuel

例句：

1. 1. The company has been using this type of waste fuel to generate electricity.
   该公司一直在使用这种废物燃料来发电。
2. 2.The government is considering investing in renewable energy sources to reduce the use of waste fuel.
   政府正在考虑投资于可再生能源源，以减少废物燃料的使用。
3. 3. The waste fuel was collected and sent to a recycling center for processing.
   收集的废物燃料被送往一个回收中心进行处理。