它提供对环境友好的产品或服务，以取代对非绿色产品的需求。
It supplies environmentally friendly products or services that replace the demand for nongreen products.
鉴于它的所有缺点，这是个大胆的构想：以能够例行进出轨道的运载工具取代一次性的火箭而开启太空时代。
For all its flaws, it was a bold idea: to replace the throw-away rockets that began the space age with a truck that could go in and out of orbit routinely.
通用从1957年开始销售聚碳酸酯以逐步取代玻璃和金属，它的应用非常广泛，从电子咖啡机到超音速飞行器的表面材料。
GE began selling Lexan in 1957. A potential replacement for glass and metal, it was used for everything from electric coffeemakers to the light covers on the wings of supersonic aircraft.
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