另外一个表达这个问题,即问分压p作为总的压强P的函数，的方式是问斜率是多少？

So another way of saying what is p as a function of capital P, is to ask the question what is the slope?

youdao

也就是说，如果朝该方向运动，函数值变动得最剧烈，那么相应的斜率就是梯度向量的模长。

OK, so if I go in that direction, which gives me the fastest increase, then the corresponding slope will be the length of the gradient.

youdao

从原点出发并连接该点所构成的割线的斜率即为曲线的平均函数。

The slope of secant drawn from the origin through the point is the average function.

youdao