However, it requires that lasers of high pulse energies are used; just as with spark plugs, a great deal of energy is needed to cause ignition of the fuel.

然而，这就要求使用高脉冲能量的激光器；与火花塞一样，需要大量的能量来引燃燃料。

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A second component, for the medium-term, would scale up financing of energy projects to reduce a country's longer-term vulnerability to high and volatile fuel prices.

第二个中期组成部分将扩大对能源项目的资助，以提高国家承受高涨的和动荡的燃料价格的长期能力。

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High energy prices and environmental concerns will also contribute to fuel cell commercialization activity and market gains.

高能量的价格和环境影响将对燃料电池商业化活动和市场收益起到促进作用。

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(Sound) Amid loud acclamations of approval, top hardline Iranian cleric, Hojatoleslam Ahmad Khatami warned the West that Tehran will produce its own high-grade uranium for a medical research reactor, if the UN International Atomic Energy Agency refuses to provide the fuel.

VOA: standard.2009.11.28

Combining high-energy fuel with scorching temperatures is the specialty of Lilliputian's founders, Samuel Schaevitz and Aleks Franz.

FORBES: Pip-squeak Power Plant

Instead of being stored in batteries, the electricity made by solar panels can be used to split water into oxygen and hydrogen molecules, the latter of which can be used as a fuel with high energy density.

WHITEHOUSE: Engage and Connect

Chu conceded that oil is a unique fuel, pairing high energy density with ease of transport.

FORBES: Energy Sec Chu Says Global Warming Is Real; Nat Gas Will Be Bridge Fuel