This prepares the loop to process the next block with an initial vector equal to the result of the first block.
于是循环可以用与第一块的结果相等的初始矢量处理下一块。
Well, , see, that is a vector field that is equal to the vector from the origin to the point where I am, so it is pointing radially away from the origin.
也就是,这个向量场等价于,从原点指向给定位置的向量,所以它是以原点为心向外辐射的。
I'm going to prove that the flux of a vector field that has only a z component is actually equal to the triple integral of, RzdV well, the divergence of this is just R sub z dV.
我将要证明,一个只有z分量的向量场的通量,等于一个三重积分,其中被积表达式为。
It is clear that that vector is the sum of that vector and that vector, by the rules of vector addition, because that plus that is equal to the A.
这个矢量是这个两个矢量之和,根据矢量加法的法则,因为这两个矢量相加就等于 A
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