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

It can be x plus some change in x plus j times y plus a change in y.

可以写成 x 加上 x 方向的变化量,再加上 y 加上 y 方向的变化量

耶鲁公开课 - 基础物理课程节选

So what do I do? Change ANS. X doesn't change.

那么它是不是小于等于x呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

It's got a change in x and it's got a change in y.

在 x 方向和 y 方向上分别发生了变化

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

T.x will change all that by offering the full slate of courses one needs for demonstrated competence in a given subject.

FORBES: Free Education Is A Meme Whose Time Has Come

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