For example, if we're talking about a pitcher, like Matsuzaka, we might want to know the speed of his average fastball.
举例来说,如果我们谈到一个投手,就像松阪,我们想知道他投出,快球的平均速度。
My birthday's coming up and we are having a big celebration.
我的生日就快到了,我们会有一个盛大的庆祝仪式。
One way to think about this intuitively if the derivative is very large the function is changing quickly, and therefore we want to take small steps.
关于这个方法很直观的一点想法是,如果导数非常大,函数也就变化的非常快,因此我们想一小步一小步的来。
We're almost done here.
我们就快讲完了。
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