1、The directional derivative according to the vector fields was introduced.
引入了相應(yīng)于矢量場的方向?qū)?/a>數(shù)。

2、The directional derivative in a direction that's perpendicular to the gradient is basically zero.
垂直于梯度的方向上,方向?qū)?shù)為零。

3、We discuss several different definitions of directional derivative and gradient vector.
討論了幾種不同的方向?qū)?shù)和梯度的定義。

4、Well, it's actually the directional derivative in that direction.
它其實是那個方向的方向?qū)?shù)。

directional derivative翻譯