" Pep rally" doesn't have a direct analog in a lot of languages and cultures, but can be approximated.

“Pep rally” 在很多语言和文化中没有直接的类比，但可以近似。

In fact, most of the concepts I've talked about in this series, with respect to vectors as arrows in space, things like the dot product or eigenvectors have direct analogs.

事实上 我在这个系列中讲过的大部分概念 关于空间中的箭头向量 像点积或者特征向量都有直接的类似物。