There is no curl. This is not what curl measures.
这个场里没有旋度,旋度是不度量拉伸之类的东西的。
That other field is given from the first one just by taking its curl So, after you take the curl, you obtain a different vector field.
另一个向量场,是通过计算第一个向量场的旋度得到的,计算旋度之后,就可以得到一个不同的向量场。
Now, an important difference between curl here and curl in the plane is that now the curl of a vector field is again a vector field.
和平面上的旋度的一个重要的不同点是,这里向量场的旋度,仍然是一个向量场。
The bill seemed to curl up as if it had been rolled and stuck into the end of a gun barrel.
VOA: special.2009.11.14
- These ones should curl, see if I can - oh, not bad. Let's run it.
这些东西可以卷上去,让我们看看,结果不错,让我们来运行一下程序。
just to cut hair, dye hair, curl hair, fun stuff.
剪头发,染头发,卷头发,有意思的事。
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