energy-saving and cost-reducing

• 节能降耗

energy-saving and cost-reducing的用法和样例：

例句

1. So far, China's efforts to rein in its roaring energy use have been mixed.
   目前为止，中国节能降耗努力所取得的成效喜忧参半。
2. Unsustainable development means that we have not done well in saving energy and resources and protecting the environment.
   所谓不可持续，就是我们还没能很好地解决节能降耗问题和生态环境问题。