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.
在市场确定奥巴马对股市是好是坏以及好坏程度以前，股市反复波动将趋向于成为常态。
Until the market decides if Obama is good or bad for stocks, and to what degree, volatility is apt to be the norm.
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