secondary energy

例句：

1. 1. The new solar panel technology can generate more secondary energy.
   新的太阳能面板技术可以产生更多的次级能源。
2. 2. The company's research focuses on developing secondary energy sources to reduce carbon emissions.
   该公司的研究重点在于开发次级能源源以减少碳排放。
3. 3.The government has proposed a plan to promote the use of secondary energy in transportation.
   政府提出了一个计划，旨在推广使用次级能源在交通领域的应用。