They include advanced, membrane-filtered wastewater treatment systems, solar-powered, high-efficiency lighting and natural gas combined-cycle turbines that will deliver power, heating and cooling.
它们包括先进的薄膜过滤污水处理系统、高效的太阳能照明，以及用于供电、供热和制冷的天然气联合循环涡轮机。
Natural wastewater treatment systems, he says, are more than 20 times more cost effective than man-made alternatives.
他说，废水自然处理系统的费效比也比人工废水处理高20多倍。
The site's natural resource recovery systems, developed by the local people, have saved the city of Kolkata from the costs of constructing and maintaining wastewater treatment plants.
此地由地方群众开发的自然资源恢复系统把科卡塔市从建设和维护废水处理装置的大量花费中解救了出来。
The site's natural resource recovery systems, developed by the local people, have saved the city of Kolkata from the costs of constructing and maintaining wastewater treatment plants.
此地由地方群众开发的自然资源恢复系统把科卡塔市从建设和维护废水处理装置的大量花费中解救了出来。
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