与此同时，迟疑不决是有代价的。

Meanwhile, further delay comes at a cost.

我在大部分事情上，是个迟疑不决的、动摇不定的人。

I am a very irresolute, vacillating man in most things.

理论上说，原告必须要证明，正是由于环保局的迟疑不决，才导致了他们一些具体的损失，这些损失通过采取监控可能挽回——在同气候学一样充满了不确定性的这个领域里，这是一个很苛刻的要求。

In theory, they must prove that the EPA's foot-dragging has caused them some specific harm that regulation might remedy-a tall order in a field as fraught with uncertainty as climatology.