下列想法可以用于正式的课程中，或者是自学时。

These ideas can be used for formal lessons, or for spontaneous learning opportunities that present themselves.

youdao

这里没有正式的课程，没有正式的老师——根本就是开玩笑。

There are no regular courses, no regular teachers, and it's totally a joke.

youdao

但我不会为你个人的画作或煎蛋卷评级，也不会为给你一个正式的课程等级。

But I wouldn't put grades on your individual paintings or omelets or give you an official grade for the course.

youdao

So, normally at this point, we do actually start class with a little bit of history from alchemy to modern chemistry, but I decided to skip that this year.

通常在这个时候,我们要从一些从炼金术,到现代化学的历史出发正式开始我们的课程。

麻省理工公开课 - 化学原理课程节选

And unsurprisingly-- since I announced this was going to be the result before the class had barely gotten started-- I don't think any of these arguments work.

我在课程还没正式开始的时候,就已经说过了,我认为这些论证都站不住脚

耶鲁公开课 - 死亡课程节选