Older equipment powered by fossil fuels should be inspected every year to make sure it continues to be safe.

VOA: special.2010.02.02

The whole thing is being powered by sending heat from the hot to the cold reservoir.

所要做的所有事情,就是把热量从高温热源输送到低温热源。

麻省理工公开课 - 热力学与动力学课程节选

They were robots powered by hydraulics.

当时的机器人需要用水力来带动

耶鲁公开课 - 心理学导论课程节选

A new study in West Africa shows how farm irrigation systems powered by the sun can produce more food and money for villagers.

VOA: special.2010.01.11

One day,a salesman came to the work area with a new drilling machine powered by steam.

VOA: special.2010.09.04

The lunar rover was powered by electricity.

VOA: special.2009.07.29

These systems were powered by electricity.

VOA: special.2010.08.05

Five years ago, dairy farmer Darryl Vander Haak flipped the switch on the first electric generator in Washington State powered by manure.

VOA: standard.2010.02.23

"If we had a clean energy economy powered by wind and solar and tidal power we probably would not be here having this discussion today."

VOA: standard.2010.07.31

It's a single rotor helicopter powered by batteries made by US Hybrid.

VOA: standard.2010.08.11

"Two-point-four billion dollars in highly competitive grants to develop the next generation of fuel-efficient cars and trucks, powered by the next generation of battery technologies all made right here in the U.S.of A,"

VOA: standard.2009.08.05

But by nineteen seventy-nine, the world's first nuclear-powered submarine had become an old ship.

VOA: special.2010.06.11

Walls of flames powered through communities, propelled by strong winds.

VOA: standard.2009.06.24

But the report says the number of attacks with high-powered roadside bombs provided by Iranian forces declined in recent months, and many leaders of Iraqi groups allied with Iran have been killed, captured or exiled, or have gone into hiding.

VOA: standard.2009.03.31