F is a gradient field. Why?

为什么要说F是一个梯度场？

youdao

Now it should be a gradient field.

那么它应该就是一个梯度场。

youdao

So, it's a gradient field.

也就是梯度场。

youdao

They move from regions of high concentration to regions of low concentration by this natural flow down a concentration gradient.

从高浓度区域,向低浓度区域流动,顺浓度梯度流动

耶鲁公开课 - 生物医学工程探索课程节选

Movement down a concentration gradient occurs fairly rapidly over short distances like a micron or so, like the size of a bacterium.

顺浓度梯度扩散在一微米左右的短距离内,相当迅速,一微米相当于一个细菌的大小

耶鲁公开课 - 生物医学工程探索课程节选

The lesson of his research is that the act of reading observes a gradient of awareness.

WSJ: How E-Readers Change the Way We Read | Head Case by Jonah Lehrer

Pushed for time and strapped for cash, the engineers laid eight miles of track straight up Big Hill, at a gradient more than twice the safe maximum.

BBC: The wonders of Canada by rail

Instead, the transistors operate on a gradient of electrical current.

FORBES: MIT Scientists Develop A Chip That Mimics Brain Synapses