We've known each other for 8 years.

我们认识8年了。

恋爱八个年头 - SpeakingMax英语口语达人

Moreover, it's had a 17.8% average return for the last ten years, which is number one among university endowments.

甚至,过去十年中,耶鲁基金的年均收益率高达17.8%,依然高居全美高校榜首

耶鲁公开课 - 金融市场课程节选

.. The equity premium is the-- 2.8% this short-term 2.8% is the riskless return, historically, for a period of almost 200 years.

股权溢价就是-,这个短期无风险投资收益率是，是根据近200年的数据得出的。

耶鲁公开课 - 金融市场课程节选

The big question for American now is whether there will be light at the end of the tunnel after more than 8 years of war there, after all that life lost and fouture spent.

现在对于美国一个重要的问题就是,是否有曙光的出现,8年的战争中，美国政府花费了大量的金钱，很多人也因为战争也失去了生命。

普林斯顿公开课 - 国际座谈会课程节选