But now we find that this brain region can actually learn to recognize when you might make a mistake, even before a difficult decision has to be made.

但是现在我们发现，事实上，当人们有可能犯错的时候，甚至是在人们作艰难的决定之前，大脑的这一区域就在学着认知这些因素。

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This decision was a very difficult one for me to make.

这对我来说是一个困难而重大的决定。

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This had been a difficult decision for Tyler to make.

VOA: special.2009.01.29

"For me,this will be a difficult decision to make.

VOA: standard.2009.08.26

But the special circumstances of the Provenge case make this decision difficult to predict.

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All of these represent terrific entrepreneurial teams, which make this decision so difficult.

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If Mannkind stumbles again Mann may have to make the difficult decision to liquidate parts of this portfolio, something he wasn't willing to do to keep either his philanthropy or airplane company going.

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