Remember I told you about my brother,

记得我跟你说过我哥的事吗

because my hair didn't grow long enough.

因为我的头发太短 不打弯

you keep in your locker.

吓坏了

Did you tell her any of your dumb jokes?

你是不是给她讲你那些冷笑话了

I'm exhausted.

噢 我感觉很累

There. Attagirl.

好吧

So many nooks and crannies.

数不尽的犄角旮旯

Oh, well, I don't think I'd wanna get lost.

我可不想消失

- Can you not do that? - I mean,

你能别这样吗

and let him go by. Well,

留出位置让他出去

So, one way to find the angular momentum of the spinning disk

所以求旋转圆盘角动量的一种方法是

and the thumb points in the direction of angular momentum.

大拇指所指的就是角动量的方向