第四段主要讲了什么？

What is the fourth paragraph mainly about?

youdao

第四段主要讲述人类语言中句子结构的数量。

Paragraph 4 mainly tells us the number of sentence structures of human languages.

youdao

youdao

Here's a little video clip that I'd like to show you that talks about evolution and how humans have evolved in relationship to their food.

接下来我们看段视频,主要讲述了生物演化,还有人类和食物之间的演化关系

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now, in the course of this discussion, Socrates and his disciples argue about not so much the existence of the soul, but the question really is the immortality of the soul.

在这段谈话中,苏格拉底和他的学生们,讨论的主要不是灵魂存在的问题,而是灵魂不朽的问题

耶鲁公开课 - 死亡课程节选

It's called "Great Gate of Kiev" So let's listen to a little of this, 1874, I believe, or 1870s surely, and let's listen to a bit of it and then we're going to focus just on the rhythm.

它被称为《基辅的城门》,咱们听一小段,一八七四年,我相信肯定是十九世纪七十年代,大家来听一小段,我们主要注意一下节奏

耶鲁公开课 - 聆听音乐课程节选