负面因素的组合已经创造了一个“完美风暴”，他说。
The combination of negative factors has created a "perfect storm," he said.
范德比尔大学的体育经济学家约翰'弗鲁曼说："NFL是一个完美的组合，"因为一个球队.
“The NFL is a perfect portfolio,” says John Vrooman, a sports economist at Vanderbilt University, because one team's losing season and sagging revenues are offset by another team's banner year.
最好能够确定下某些准则，从一种较好的估计开始，然后逐渐找到那一个完美的组合。
It's better to determine some guidelines, start with a good rough estimate, and then go from there.
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