Hydrogen is a clean and efficient energy source and is expected to take an important role in future energy demand.

氢是洁净而高效的能源，并有望在未来能源供求中占有重要位置。

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The surface modification of PP materials by plasma is a clean and efficient processing, which has huge market potential and development prospects.

利用等离子体对丙纶材料进行表面改性是一种清洁高效的工艺，具有极大的市场潜力和发展前景。

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Hydrogen is a clean and efficient energy carrier and is expected to play an important role in future energy share.

氢是一种清洁能源，它利用后产生的最终产物是水。

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Lets say a person chooses one of the NeoLink servers on the network from the home screen, they will be taken to those servers files via a clean and efficient UI.

ENGADGET: HD Review: NeoDigits X5000 Networkable DVD player

We found some incredible student innovators including our 2008 winner, Husk Power Systems a social enterprise that has already provided clean, safe and efficient electricity to more than 150, 000 low-income people in rural India.

FORBES: Student Innovators Save the World: Part 1

Since gas-fired generation is about the most scalable, efficient, flexible, clean and (on a large scale) lowish-carbon form of electricity available, it is going to prove economically and politically attractive.

WSJ: After Japan's Earthquake and Fukushima Disaster, Matt Ridley on Gas-Fired Generation and Thorium | Mind & Matter