Experts caution that the harmful effect of fog on our health is often concealed.
译文：专家提醒说，雾对人体健康的危害有很大的隐蔽性。
Among the causes that lead to inferior health, harmful life style and various pressures have the leading effect.
在导致亚健康的诸多原因中，不良生活方式和各种压力起着主导作用。
There was no obvious harmful effect on the workers' health in the underground semi-closed circumstance for a rather short time staying.
地下半密闭环境在短期内对人员健康无明显不良影响。
Methods The harmful levels of occupational hazards and the effect of protective measures were evaluated by field occupational health survey, engineering analysis, detection and test.
方法采用现场职业卫生调查、工程分析、检测检验等方法，评价其职业病危害程度和防护措施效果。
The results showed that there were 36 to 131 sorts of benzene and its derivatives, heterocyclic compounds, and polycyclic compounds being detected. Most of them have harmful effect on human health.
分析结果表明，这些香烟中，含有苯类衍生物、杂环类化合物及多环化合物等，从36种到131种不等，绝大多数有害人体健康。
The results showed that there were 36 to 131 sorts of benzene and its derivatives, heterocyclic compounds, and polycyclic compounds being detected. Most of them have harmful effect on human health.
分析结果表明，这些香烟中，含有苯类衍生物、杂环类化合物及多环化合物等，从36种到131种不等，绝大多数有害人体健康。
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