They can operate on solar energy alone.

它们靠太阳能运转。

youdao

However, when the sun goes down, what happens to this plane that depends on solar energy to stay in flight?

然而，当太阳的股价下跌，会发生什么，以这架飞机，取决于太阳能留在飞行？

youdao

The Seaswarm robots operate on solar energy and require only 100 watts of power, or about that of a bright light bulb.

海群机器人使用太阳能，只需要10 0瓦功率就能驱动，相当于点亮一个灯泡。

youdao

"Lots and lots of companies from overseas, especially from China, selling very cheap products, that users can have in order to recharge their cell phones or small devices, that run on solar energy or wind energy."

VOA: special.2011.01.10

So everything from creating solar hot-water systems on our rooftops to making our buildings much more energy efficient."

VOA: special.2011.07.08

But with fewer solar panels, they fell behind the German team on the most important requirement: energy production.

VOA: special.2009.10.27

By the beginning of 2015, Krueger said, El Cabito should run entirely on solar energy.

BBC: Lodges Robinson Crusoe would love

Pocket calculators and wristwatches that operate on solar energy have been on the market for many years.

FORBES: Apple's iPhone To Soak Up The Sun

Pocket calculators and wristwatches that operate on solar energy have been on the market for many years and are widely used.

FORBES: iPhone 2.0: Solar-Powered Mobility