首先，造成自由基生成的增加，激活一些分子造成细胞中敏感物质如dna等的损伤，因而造成了细胞过早的凋亡。

First, it increases the production of free radicals, highly reactive molecules that tear about sensitive cell components like DNA, causing premature cell death (apoptosis).

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用于存在危险物质或者敏感物质或进行污染物处理的环境，采用标准GJBZ063-94《隔绝式防毒衣通用规范》。

It is used in the environment with hazardous substances or sensitive materials or pollutants being treated, adopting General Specification of Isolated Type Protective Clothing (GJBZ063-94).

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要么是伦斯顿的学生接触了更多的化学物质，要么是他们比十年前的学生对这些物质更敏感。

Either Renston's schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

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This conversion from a mechanical energy into a chemical energy can be nicely visualized when one fills a hair cell with a sensitive die that responds to the calcium ions that influx into the cell.

如果在毛细胞中注入,对钙离子敏感的物质,可以精确地模拟,这一机械能到化学能的转化过程。

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