sit in on造句

Will they permit you to sit in on a few classes?
他们会同意你旁听几节课吗？

People can sit in on meetings, even if it's not really in their subject area.
即使不在其研究专题范围之内，人们也可以列席会议。

He was invited to sit in on a rehearsal.
他被邀请参加预演.