我想罗嗦一下，质量，而不是摩尔数。

And, I mean literally, mass, not mole number.

youdao

转身数的总和必须是零，这是为了避免陷入某些环路，比如大写字母 G 形状的环路（在纸上试着走一下这个形状，就会明白我的意思）。

The requirement that your turns sum to zero is necessary to keep you from getting caught in certain loops, such as one shaped like a capital G (try it out on paper to see what I mean).

youdao

助教数一下吧，因为我不想做，保持手举着。

Would one of the TAs count, because I don't want to. Just hold your hands up.

youdao

So check that I counted right, 1, 2, 3, 4, 5, 6, 7, 8 and 1, 2, 3, 4, 5, 6, 7.

查一下我数的对吗,12345678,和1234567

耶鲁公开课 - 博弈论课程节选

Would one of the TAs count, because I don't want to. Just hold your hands up.

助教数一下吧，因为我不想做，保持手举着。

麻省理工公开课 - 固态化学导论课程节选

All right. I tried it on 2, I surely didn't expect a precise and exact answer to that but I got something, and if you square this, you'll find the answer kept pretty darn close to 2.

好，我试试求2的平方根,我当然不希望得到一个完全准确的答案了,但是我得到了一个近似值，试试将这个数平方一下,你会发现结果和2相当接近。

麻省理工公开课 - 计算机科学及编程导论课程节选