我不明白他在说些什么。

I don't understand what he's saying.

《牛津词典》

要么说些听众搞不明白的术语，要么解释听众早已熟知的概念，这是差劲演讲的两个极端。

Using acronyms that the audience doesn't know or explaining concepts that the audience already gets are two good ways to be a bad speaker.

youdao

她的裙子很漂亮，当被问及她的相貌时，她明明白白的知道要说些什么。

Her dress was beautiful and she knew exactly what to say when they asked her the question about her looks.

youdao

To state the obvious, Socrates introduces this analogy to help the brothers better understand what justice is for an individual soul.

说明白些就是，苏格拉底导入这项比拟,以协助兄弟档更了解,正义对个人灵魂的重要性。

耶鲁公开课 - 政治哲学导论课程节选