And I can rewrite this in vector form as the gradient dot product the amount by which the position vector has changed.

可以把这些用向量形式重新写下来，就是梯度向量和位置改变量的点积。

youdao

The charity worker was with friends on the night of 22 July 2007 when he stumbled, but he was unable to break his fall as the road had a steep gradient.

BBC: Man wins damages for brain injury in Haringey pothole fall

Short-end bill prices fell sending implied yields higher by five basis points forcing the gradient of the curve higher as the steepening process grinds forward.

FORBES: Dollar Hits The Skids, Inflation Fear Rages