这些网站确实在抵消二氧化碳的排放，并且某种意义上他们也确实为防止环境污染作出了贡献。
It's true that these sites are purchasing carbon offsets, and in some cases that can have beneficial environmental effects.
不可再生的资源进行无害化处理，防止环境污染。
The resources should not regenerate carry on the harmlessization handle , Guard against pollution of the environment .
由NRF2基因表达的产物通常通过吸收和泵出细胞的方式，防止香烟及柴油废气等环境污染物对细胞的损害。
Products made by a gene called NRF2 normally protect cells from environmental pollutants like cigarette smoke and diesel exhaust by absorbing the materials and pumping them out of the cell.
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