No matter what level of exposure of smoke you have, your lung cells know it and they are responding.
无论你暴露在何种程度的烟雾环境中，你的肺部细胞都知道并且会做出反应。
However, TCDD does not affect genetic material and there is a level of exposure below which cancer risk would be negligible.
不过，TCDD并不影响遗传物质，并且低于一定剂量的接触，致癌风险可以忽略不计。
Objective To evaluate their level of exposure to silica dust in the workers employed in geologic exploration industry using a quantitative method.
目的对接触矽尘的地质勘探工人的接尘水平进行定量评价。
In addition, whether adverse effects are observed in some species and not others may vary depending on the level of exposure and which melamine analogues are present.
另外，无论有害影响在一些物种上被观测到还是在另一些物种没有观测到，可能取决于摄入量的多少和是哪一种三聚氰胺的类似物。
In addition, whether adverse effects are observed in some species and not others may vary depending on the level of exposure and which melamine analogues are present.
另外，无论有害影响在一些物种上被观测到还是在另一些物种没有观测到，可能取决于摄入量的多少和是哪一种三聚氰胺的类似物。
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