energy gain

例句：

1. 1.The new technology can significantly improve energy efficiency.
   这项新技术能显著提高能源效率。
2. 2. The company's decision to invest in renewable energy sources has led to a significant energy gain.
   公司决定投资可再生能源，这导致了显著的能量增加。
3. 3.To achieve sustainable development, we need to focus on increasing energy efficiency and reducing energy waste.
   为了实现可持续发展，我们需要专注于提高能源效率和减少能源浪费。