When you get--this is Rituparna, counting the leaves on a tree-- you can estimate, from a sample, the population expected values.

如果你...像数叶子的睿都巴若那一样,只有部分样本的话,你可以来估计总体均值

耶鲁公开课 - 金融市场课程节选

You don't have to count all the leaves on the tree, you can take a sample and you count that and then you multiply.

你不必数树上所有的叶子,你可以抽样,然后计数,再相乘即可

耶鲁公开课 - 金融市场课程节选

Somebody told me, by the way, that the sample concept sheet that we have listed on the website couldn't be downloaded, so we'll fix that, but we'll also send you out by email a sample concept sheet, along with guidelines for how to prepare them.

有人告诉我,顺便说下,网站上所列的观点报告范例不能下载,我们会进行修复的,同时我们也会通过电子邮件将范例报告,以及备写指南一并发给你们

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选