本章将分析环境政策的科学不确定性（scientific uncertainty）。如Jasanoff 所言，“作为概念框架，‘风险’为环境法规的制订赋予 Douglas, M.
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就先前交流信息未能很好地解释气候科学不确定性的投诉，文件应给予答复。
It should answer the complaint that previous communications have failed to properly explain uncertainties in climate science.
也正是在这样一种背景下，应科学不确定性的环境问题的需要，风险预防原则应运而生。
Under this circumstances, the precautionaryprinciple emerges at the historic moment in order to meet the demand ofenvironmental problems of scientific uncertainty.
在任何公共卫生突发事件期间，卫生官员必须在极大的科学不确定性基础上作出紧急，往往是影响深远的决定。
During any public health emergency, health officials must make urgent, often far-reaching decisions in an atmosphere of considerable scientific uncertainty.
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