So, let me draw a picture of the wheel after things have rotated by a certain amount.
我画一个,做了一定转动的车轮。
If the two level curves are tangent to each other that means they have the same tangent line. That means that the normal vectors should be parallel. Let me maybe draw a picture here.
如果两个等高线相切，说明它们的切线相同，也就是说他们的法向量应该平行，我再在这里画个图。
Visitor: Oh, yes, This is the master plan... quite clear developed, however, it's still a bit difficult for me, an English, to read.would you please draw a clearer picture to me?
参观者：哦，是的是的。这平面图……虽然画得很清楚，但我是英国人，所以看了还是感到很茫然，你能帮我比划比划吗？
A good pattern, to preach in the hands of women, and you draw me a picture, down from generation to generation, has become the traditional program.
一副好的花样，在妇女手中转来传去，你描我画，代代流传，已变成传统的程序。
A good pattern, to preach in the hands of women, and you draw me a picture, down from generation to generation, has become the traditional program.
一副好的花样，在妇女手中转来传去，你描我画，代代流传，已变成传统的程序。
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