Experts think the toxic chemicals in smoke can damage the DNA in hair follicles and generate cell-damaging free radicals as well.

专家们认为香烟中的有毒化学物质灰损害毛囊中的基因，同时产生破坏细胞的自由基。

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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.

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。

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Objective To study the separate and combined effects of cigarette smoke solution and chrysotile on cell proliferation activity.

目的探讨香烟烟雾溶液与温石棉单独及联合作用对细胞增殖活性的影响。

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"The failure rate was higher than predicted as part of the certification process and the possibility that a short circuit in a single cell could propagate to adjacent cells and result in smoke and fire must be reconsidered, " said Deborah Hersman, the head of NTSB.

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