核能和水力发电站都建立了，都是低碳技术，但不确定的安全和开支阻止了前者，而地理因素限制了后者。
Nuclear and hydroelectric power are established, low-carbon technologies, but safety and cost uncertainties hamper the former, while geography limits the latter.
比起应用于风能、水力发电、生物燃料或者核能，新材料学和纳米技术在太阳能领域的应用将为其成本降低提供更大的超出人们想像的可能性。
The application of new materials science and nanotechnology offers the possibility of cost reductions much larger than can be imagined in windpower or hydropower, in biomass or in nuclear power.
比起应用于风能、水力发电、生物燃料或者核能，新材料学和纳米技术在太阳能领域的应用将为其成本降低提供更大的超出人们想像的可能性。
The application of new materials science and nanotechnology offers the possibility of cost reductions much larger than can be imagined in windpower or hydropower, in biomass or in nuclear power.
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