Listen again to part of the lecture, then answer the question.
再聽一遍這個(gè)演講中的一小節(jié),然后回答問題。
I read about this and the book said one thousand kilometers of roots.
我閱讀過這個(gè),書上說,根有一千千米長。
I kept thinking: this has to be a mistake.
我一直在想:這肯定是個(gè)錯(cuò)誤。
It just doesn't make any sense to me that...that...that could be right.
我覺得沒道理,那不是對(duì)的。
But that's what all the books have, and no one's ever corrected it. So, let me explain to you about this rye plant.
但是所有的書上都是那樣寫的,沒有人修改過。那么,我來給你們解釋下這株黑麥。
What does the professor intend to explain?
教授要解釋什么?