标量的梯度描述的物理意义是什么?矢量有没有梯度?如果有,它的物理意义又是什么? 知乎 Template




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tomski标量的梯度描述的物理意义是什么?矢量有没有梯度?如果有,它的物理意义又是什么? 知乎 coloring