The test results show that the ozone has double functions of saving fuel and reducing emissions in the process of combustion.
试验结果证明：臭氧参与柴油发动机的燃烧过程起到了节油和降低排放的双重效果。
The utility model has the double functions of humidification and treatment and has the advantages of low cost and long service life.
本实用新型做到加湿，治疗二用，且成本低，寿命长。
This article tells us the material of aesthetics pavement, and how to chose the material in different environment, in order to realize the double functions of the aesthetics pavement.
本文还对景观铺装材料进行了介绍，同时论述了在不同的环境中如何选择铺装材料，以实现景观铺装的双重功能。
The two-edged actions of Matthew Effect in education have double functions.
“马太效应”在教育中具有双刃作用。
The two-edged actions of Matthew Effect in education have double functions.
“马太效应”在教育中具有双刃作用。
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