The results demonstrated that the organic sylvite can reduce tar and a relationship between tar and the kind and content of organic sylvite exists to a certain extent.
研究结果表明，所加的有机酸钾能够降低焦油量，且在一定范围内添加钾盐种类及添加量与焦油量具有密切的相关性，对其他诸项也有一定的影响。
Smoking cigarettes that have a lower yield of tar does not substantially reduce the risk for lung cancer.
吸那些焦油含量较低的香烟本质上不能降低癌症风险。
The results indicate that acid and alkali catalysts can increase the tar cracking reaction speed and reduce the activation energy due to the activated center.
结果表明，酸性和碱性催化剂由于活性中心的存在，加快了反应速度和降低了反应活化能。
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