So, what's the change in x here?

那么x在此处的变化又是什么呢？

youdao

That means when I vary x the first order the function doesn't change.

这意味着如果x变化,函数值不会发生一阶变化。

youdao

How does it change because of x?

它怎么随着x发生变化呢？

youdao

And that's the following. Let's take a particle that is moving in the x-y plane, so that at one instance-- sorry, let me change this graph-- is here--oh, this is bad.

接下来,我们来看一个物体,在 x-y 平面内运动,在这个例子中,对不起,我要重画一下这个图,在这里,这画得不好

耶鲁公开课 - 基础物理课程节选

Poor man, he was interrupted about every five minutes by admirers or well wishers, including my predecessor on X-Change, Quentin Cooper.

BBC: The BA Science Festival

The X-Change went well with Professor Pete Vukusic bringing colour and iridescent butterflies to the proceedings, and Clifford Stott getting a rise out of the audience on why people become violent in groups.

BBC: The BA Science Festival

The chart on the right takes data from the US Energy Information Agency and plots total US inventories of crude plus all other categories of liquid hydrocarbons, and shows the change between the week ending on the x-axis date, and the inventories for the like week of 2010.

FORBES: Falling Oil Prices Make No Sense