Efficiency is crucial in such cells if they are ever to be a substitute for existing methods of mass power-generation, such as coal and gas.
对于这些太阳能电池来说，要想取代现有的大规模发电方法，如煤炭和天然气，最关键的是效率。
China has a technological lead in turning coal into gas. It has been using the technology widely to make petrochemicals and fertilizers as a substitute for pricier natural gas.
中国在煤气化领域拥有技术领先优势，已在石化及化肥生产领域用到了这一技术，用以替代更为昂贵的天然气。
Advocates like the former oil tycoon T. Boone Pickens have also long sought to promote it as a substitute for coal in electricity generation or gasoline in a new generation of natural gas cars.
前油业大亨皮肯斯这样的支持者也一直以来试图将其作为电煤的替代者和在新型的天然气车中作为汽油的替代者。
Advocates like the former oil tycoon T. Boone Pickens have also long sought to promote it as a substitute for coal in electricity generation or gasoline in a new generation of natural gas cars.
前油业大亨皮肯斯这样的支持者也一直以来试图将其作为电煤的替代者和在新型的天然气车中作为汽油的替代者。
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