The question muddles up three separate issues.

该问题把3件互不相干的事情混淆了。

《柯林斯英汉双解大词典》

It helps people to understand complex issues and to separate fact from fiction.

它能够帮助人们理解复杂的问题，区分事实和虚幻。

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First, it is sometimes difficult to separate the policy and scientific issues.

首先，有时很难区分政策和法律问题。

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First, it is sometimes difficult to separate the policy and scientific issues.

首先，有时很难区分政策和法律问题。

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