partial derivative [数] 偏导数
mixed partial derivative 混合偏导数
approximate partial derivative 近似偏导函数
partial derivative of higher order 高阶偏导数
second order partial derivative 二阶偏导数
first-order partial derivative 一阶偏导数
Higher partial derivative 高阶偏导数
hybrid partial derivative 混合偏导数
pseudo-partial-derivative 伪偏导数 ; 基于伪偏导数 ; 采用伪梯度向量
That was this symbolic vector operator in which the components are the partial derivative operators.
这个是符号化的向量算子，其中它的分量是偏微分算子。
OK, so that's the definition of a partial derivative.
好的，那就是偏导数的定义。
Somehow, when you have a partial derivative, you must resist the urge of simplifying things.
当遇到偏导数时，一定记住，不能约分。
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