If you are a physicist, that the force will be negative the gradient.
如果你是物理学家，力其实是负的梯度。
The conservative force and the gradient of the potential energy are dual vectors.
保守力与势能梯度互为对偶矢量。
The force line and potential gradient equation are deduced.
同时推导出其电力线方程和电位线方程。
The force line and potential gradient equation are deduced.
同时推导出其电力线方程和电位线方程。
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