It seems like a logical extension of that formula to three assets and you can easily see how to extend it to four or more assets, it's just the logical extension of that.

这样就将前个公式推导为三个资产的情况,显而易见,你们可以将其运用到四个乃至更多资产的情况下，这只是对原始公式一个推导罢了。

耶鲁公开课 - 金融市场课程节选

After decades of relatively unspectacular growth, compared to the east Asian economies, India's economy suddenly took off three or four years ago, growing at 8% or more a year.

经历了几十年的相对高速发展后，与其他东亚经济体相比，印度经济三或四年前突然开始腾飞,以每年8%甚至超过%,8%的速度增长。

普林斯顿公开课 - 国际座谈会课程节选

We begin to know more about three or four hundred years down the road, when there appear buildings and settlements in the world later inhabited by the Greeks, as we know, to which we give the name Mycenaean.

约三四百年之后当这块希腊人聚居的土地,出现了建筑和住宅群,我们才开始对它有了更多的了解,并将其命名为今天人人皆知的"迈锡尼文明"

耶鲁公开课 - 古希腊历史简介课程节选