But that formula forces us to return to the original Socratic question about the harmony of the soul and the city.

但那个公式迫使我们回到,原始的苏格拉底式问题,即有关灵魂与城市的和谐。

耶鲁公开课 - 政治哲学导论课程节选

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