vt. decontaminate
这项研究与其它关于吸烟的研究不同之处还在于其严密追踪吸烟所造成的影响，而将其它诸如不良饮食习惯和污染等有害因素所造成的“干扰”排除在外。
It is also different from any other smoking-related study because it strictly tracks the effects of smoking without "interference" from other harmful causes such as poor diet and pollution.
私家车排除的尾气污染空气，对人类健康产生了可怕的影响。
The toxic fumes made by cars can pollute the air and have a dreadful influence on human beings。
目前还不清楚这些实验是不是排除了其他可能的因素，例如：市区比林区的污染严重。
It is unclear whether the experiments ruled out other possible factors such as the presence of more pollution in urban areas than forests.
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