I will only do them on one condition, and that is I want to be able to teach you what the assumptions are that underlie the points in the derivation.

只在一个情况下我才会做，那就是要能够教会你们,假设是,构成了推导的基础。

麻省理工公开课 - 固态化学导论课程节选

So that what we have before us, is that kind of product and that will explain both the similarities and the differences, and that is what underlies our interpretation of how the poems got to be what they were.

所以,这些就早先吟诵者的产物,它解释了史诗和史实的相似和差异,并构成了我们演绎,《荷马史诗》产生过程的基础

耶鲁公开课 - 古希腊历史简介课程节选