The third derivative, unfortunately, was never given a name, and I don't know why.

遗憾的是三阶导数没有专门的名称,我也不知道这是为什么

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I don't play the currency market, unfortunately, because currency has gone down so much.

很遗憾我没有企图在货币市场上牟利，因为货币市场最近跌幅巨大。

耶鲁公开课 - 金融市场课程节选

"Unfortunately I don't think we'll ever get to meet the real ones, " one visitor told CNN.

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So this kind of case can escalate, and unfortunately I don't think enough consideration is given to the human side of individuals' ego, individuals' sense of self-respect, because I think if you respected people and talked to them in a respectful way, you can de-escalate many of these situations that ultimately escalate out of control.

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And I am -- I'm -- you know, unfortunately, I don't think that they are typical of America, but you can still take a lot of wonderful lessons from what you heard from these people.

CNN: Transcript of May 'CNN Money Summit: Money & Main St.'