what would it mean to read this letter out loud in a community, not alone in your dorm room,or just by yourself,in the library?

为什么书信要在人群中大声朗读，而不是在寝室里，图书馆里一人看？

耶鲁公开课 - 新约课程节选

What I want to point out to you is this part of her letter, the third paragraph here, where she says, "My idea is this."

大家来看,信的第三段,她说，“我认为“

耶鲁公开课 - 1945年后的美国小说课程节选

Why? Well, out presumably 'cause it's output, a because it's the first letter of the alphabet.

为什么？也许是因为out代表是输出吧，而a则是字母表的第一个吧。

哈佛公开课 - 计算机科学课程节选