我对他的回答做了笔记，我还在尝试把这个问题搞清楚，事情就这样发生了，一个系统本来运行良好，然后就变得很脆弱。

I got a note from him and I'm still trying to figure it all out That's what happens; the system performs very well and then it becomes vulnerable.

youdao

Some customers want to use your safe because safes are hard and expensive to get and some -and then you've got all this gold, so you might as well lend it out.

顾客需要使用你的保险箱,因为对个人而言保险箱既昂贵又难以获得,这样你就拿到他们的金子,然后你可以把金子借出去

耶鲁公开课 - 金融市场课程节选

If I want to move this stack here, I'm going to take a stack of size n minus 1 move it to the spare spot, now I can move the base disk over, and then I'm going to move that stack of size n minus 1 to there. That's literally what I did, OK?

如果我想移动这些圆盘，我先把从n-1个圆盘1,移动到多余的柱子上去，这样我就能把最底下的圆盘放到这儿了，然后再把从n-1个圆盘放到这儿来,这就是确切的我怎么做的对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选