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目前对非常规能源的作用尚难确定。对诸如核聚变发电或太阳能光电技术等领域的技术开发,主要问题是如何估计它所需要的费用。至于潮汐能和太阳的低品位热能等其它能源,则还有待于现有的技术进一步发展,而且它们的作用主要取决于矿物燃料的价格和与之竞争的其它新技术的开发。在对非常规能源作经济评价时,通常把
The current role of unconventional energy sources is still difficult to determine. For technology development in areas such as nuclear fusion power generation or solar photovoltaic technology, the main issue is how to estimate the cost it needs. As for other energy sources, such as tidal energy and low-grade heat of the sun, the existing technologies have yet to be further developed, and their role depends mainly on the price of fossil fuels and the development of other new technologies competing with them. In the economic evaluation of unconventional energy sources, usually