... 关键词： 交通运输经济；小汽车污染成本；影响路径法；健康成本 [gap=1255]Keywords： transport economy; car pollution cost; impact pathway model; cost of healthy ...
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It is easy, convenient, reliable in operation, noiseless, pollution free, and low cost, and can be made into car seating pads, chair seating pads, foot pads, bed pad, and other forms.
无污染、耗能低，可以制作成汽车座垫，椅子的座垫，脚垫，床垫等多种形式，广泛适用于个人、家庭、宾馆、饭店、学校及企事业单位使用。
Fuel cells have long promised pollution-free driving , but have been held back by their enormous cost when applied to a normal car .
燃料电池长期预示着无污染驾驶，但是当它被应用到一辆普通车上时，因其巨额的成本，举步维艰。
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