What you thought was insignificant may turn out to be the most significant thing you needed to know.

在需要的时候，那些你认为不重要的知识也会变身为最重要。

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You may have to learn things that you never thought you needed to know and overcome obstacles you never thought existed.

你可能必须要学会一些你从来没想过你需要知道的事情，并且要克服你从没想过会存在的障碍。

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Financial economists built complex models that assumed that all you needed to know about a stock was already built into its price.

金融学家们所构建的复杂模型都以一个假设为前提：即你需要知道一只股票的所有信息已经包含在了股价中。

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If you needed to know which butcher to go to, you asked your neighbors.

FORBES: In The Era Of Transparency, Trust Is The Key To Success

And so you felt like you needed to know the answer to that question to determine how you were going to handle the situation?

CNN: Transcripts from video deposition of Lewinsky, Jordan, and Blumenthal

And I'm sure that that was not an idle question on your part, and I presume that you needed to know the answer for some purpose.

CNN: Transcripts from video deposition of Lewinsky, Jordan, and Blumenthal