If the energy of these hot electrons could be captured before it is converted into wasted heat, solar-to-electric power-conversion efficiencies could be increased to as high as 66%, say scientists.

科学家们称，如果这些热电子能够在转化成热能浪费掉之前被捕获，光电能量转化可以达到最高66%的效率。

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The major difference between these two power generators is that the chemical energy of the fuel cell is converted directly to electrical power without intermediate conversion first to heat.

主要的区别在于，燃料电池的化学能量能直接转化成电能而不需要先转化成热能。

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The coefficient of heat conversion from plastic work to heat can be indirectly measured.

可以间接对材料的塑性功热转换系数进行测试；

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Secondly, when considering end-to-end efficiency, it is much less energy-intensive to heat water by direct use of natural gas on-site, rather than by using that natural gas to first make electricity that is used to heat water because of the large conversion losses at power plants.

FORBES: To Conserve Energy - Conserve Water