这是我特地为你做的。

I made it especially for you.

《牛津词典》

我特地来看你。

I came here specially to see you.

《新英汉大辞典》

例：我特地为Mary做了这个蛋糕。

Eg: I made this cake specially for Mary.

youdao

So, what we have found out so far, I'm purposely going from x to y because I want you to know that the unknown variable can be called an x or can be called a y.

到目前为止,我们有这些结论,我特地把x换成y,因为我想让你们明白,未知变量既可以写成x,也可以写成y

耶鲁公开课 - 基础物理课程节选