The result of the first value, F(0), is 0, and the result of F(1) is 1.
第一个值F(0)的结果是 0，F(1)的结果是 1。
Therefore, cat file | tail -f will not work as expected, but tail -f file will.
因此，catfile |tail -f将不会得到所期望的结果，但tail - f file则可以。
You know it's a gradient, f and you know the function, little f.
如果知道一个梯度，相应地就有一个函数。
F I have my surface and I have my vector field f.
有一个曲面，还有一个向量场。
Now we plug this into what we had before, f and that will give us our function f.
把它代入先前我们得到的，我们就会得到函数。
F And we're going to pull on this here with force f.
我要用力，拉这里。
F-o-o If I type foo, I'll get back f-o-o.
如果我键入foo，我将取回。
f You will get h and then you will get f.
得到h，然后求出。
Shoulder pads may come and go, but a b. f. f. is forever…
垫肩的流行来来去去，但永远最好的朋友确实永远…
Shoulder pads may come and go, but a b. f. f. is forever…
垫肩的流行来来去去，但永远最好的朋友确实永远…
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