A microwave oven is the most energy-efficient option.

微波炉是最节能的选择。

What of the claim that organic farming is more energy-efficient?

那为什么还有言论称有机耕作更加节能呢？

Haier is keen on Sanyo's energy-efficient refrigeration technology.

海尔青睐三洋的节能制冷技术。

The “horn” is lined with an energy-efficient strip of LED lights.

“喇叭”连接着LED灯的有效电源。

Many more promote ethanol, or renewables, or energy-efficient buildings.

更多的州致力于推广乙醇、可再生能源，或节能建筑。