My friend Nassim Talib has just written a book about it called-- maybe I'll talk about that--called The Black Swan.
我的朋友纳西姆·塔利博刚刚写了一本书,叫做"黑天鹅现象",以后我会再讲到
It's something that someone else wrote or maybe you wrote, but you can encapsulate all of your ideas or your functionality inside this thing called a function.
它是别人或你自己写的,但是你可以压缩你所有的想法,或者你这个东西里面的功能叫做一个函数。
We know there is no thing called a massless rope, but most ropes have a mass, but maybe negligible compared to the two blocks you are pulling, so we'll take the idealized limit where the mass of the rope is 0.
我们都知道无质量的绳子是不存在的,是绳子就有质量,但是相比于这两个物体就可以忽略不计了,所以我们有了这个理想的条件,即绳子的质量都是 0
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