involve:
及物动词 vt. [W]
1.使卷入,连累;牵涉[(+in/with)]
That's no concern of mine. I'm not involved.
那与我无关,我未卷入。
Don't involve me in your quarrel!
不要把我牵扯进你们的争吵中!
2.需要,包含,意味着[(+in)][+v-ing]
His work involves occasional journeys.
他的工作偶尔需要出差旅行。
3.使专注,使忙于[(+in)]
He was involved in writing his doctoral dissertation.
他在聚精会神地写他的博士论文。

stay out of:
远离；别管
Stay out of this matter, please.
请别管这件事。
Stay out of things that don't concern you.
少管那些与你无关的事。

take classes:
上课
After that they take classes in their major area of study.
学习这些基础课程后他们主修自己的专业。
I like ikebana very much and I take classes in it.
我很喜欢插花，并且我由参加插花的课程。