我想这是我还不懂得欣赏的东西。

I guess it's something I haven't acquired a taste for yet.

youdao

我还不懂怎么埋藏我的感情。

I even did'd know how to hide my moods.

youdao

你说人活着为的是什么我还不懂也?。

I don't understand what you are saying…

youdao

Okay. For those who have not seen a radian, it's just another way to measure angle with the understanding that a full circle, which we used to think is 360 degrees, So a radian is roughly 60 degrees.

我想告诉那些还不懂弧度制的同学,这是衡量角度的另一种方法,理解起来是这样的,对于一个整圆,也就是我们之前所说的360°,所以1弧度大约是60°

耶鲁公开课 - 基础物理课程节选