And now it seems to me the beautiful uncut hair of graves, Tenderly will I use you curling grass, It may be you transpire from the breasts of young men.

VOA: special.2009.04.12

Sometime later, I will deal with functions of more than one variable, which I will briefly introduce to you, because that may not be a prerequisite but certainly something you will learn and you may use on and off.

再过段时间,我要开始处理多变量函数,到时候我会向你们进行简单介绍,因为那不是必须的,但是你们以后会学到,有时候还能派上用场

耶鲁公开课 - 基础物理课程节选

Like I mentioned, you can also use "I want to" to ask if you may do something indirectly.

就像我之前说的，你可以用“I want to”句型间接地询问你是否可以做某些事。

I want to 课堂 - SpeakingMax英语口语达人