瑞士研究人员指出如果一个人一天10小时反复接触热敏纸，他暴露在BPA下的程度是每日最高耐受值的42倍。
The Swiss researchers reported that a person repeatedly touching thermal printer paper for 10 hours a day could be exposed to 42 times the present tolerable daily exposure.
这是因为许多环保人士与科学之间的关系某些程度上颇为反复无常。
This is because of the somewhat inconsistent relationship that a lot of environmentalists have with science.
哮喘是一种慢性病，以呼吸困难和喘息反复发作为特征，其严重程度和发作频率因人而异。
Asthma is a chronic disease characterized by recurrent attacks of breathlessness and wheezing, which vary in severity and frequency from person to person.
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