意大利，西班牙和爱尔兰国 债间的收益率差距在最近收窄前曾一度急剧扩大。

The spread over Bunds for Italian, Spanish and Irish bonds also widened dramatically before narrowing again more recently.

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但是收益率差距扩大至少部分反映了人们对欧元区一些国家可能很难偿还借款的担忧。

But at least part of the rise in spreads reflected concern that countries might find it hard to pay back their borrowings.

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上个月雅虎声称其为了缩小收益率差距的一个新的广告算法被延期了，其股票价格因此跌了22%，这也是有史以来其单日内的最大跌幅。

Last month Yahoo! Said that a new advertising algorithm that it had designed to close the gap in profitability will be delayed, and its share price fell by 22%, its biggest-ever one-day drop.

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The difference between the average return for colleges and universities and Yale's returns has added $14.4 billion dollars to the University's coffers.

其他高校的平均收益率,与耶鲁的收益率的差距,为耶鲁财政增加了144亿美元

耶鲁公开课 - 金融市场课程节选