专家们注意到“教科书是有层次的，就像洋葱一样”。对于主动学习者来说，接触课本是一种具有互动性的体验。

Experts observe that "textbooks come in layers, something like an onion". For an active learner, engaging with a textbook can be an interactive experience.

youdao

让你自己的知识替你说话比起主动引起别人的注意更有效。

Allow your knowledge to speak for itself, rather than insisting that people pay attention.

youdao

然而当刻意注意一段时间后，直到我已经到达那个主动不会想吃肉的状态抵抗起来就越来越容易了。

However, I've noticed that over time, it became easier and easier for me to resist until I got to a point where I just didn't feel like I wanted to eat any at all.

youdao

Better attention, better understanding of the material if you are actively engaged, as opposed to just taking down passive notes.

主动参与，集中注意，更好地理解材料，而不是被动做笔记。

哈佛公开课 - 幸福课课程节选