It could also be because ozone in the buildings is sucking up squalene. This was the first study to look at skin-derived substances in indoor dust.
这可能是因为烹饪和其他活动也同样向室内环境中释放了胆固醇，也有可能是因为建筑物中的臭氧正在吸收鲨烯。
Foreign material remover on each sucking pipe makes final guarantee for quality of cigarettes. Vibratory sieve and dust collection system provides the possibility of re-use of tobacco dust.
每个吸管上设有除杂机构在卷烟机前最后一次去除杂物，螺旋筛分功能及烟末分离收集系统更进一步确保了烟支的质量。
Foreign material remover on each sucking pipe makes final guarantee for quality of cigarettes. Vibratory sieve and dust collection system provides the possibility of re-use of tobacco dust.
每个吸管上设有除杂机构在卷烟机前最后一次去除杂物，螺旋筛分功能及烟末分离收集系统更进一步确保了烟支的质量。
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