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....

v.出席...

sit in on的音标：sit in on的英式发音音标为：[sit in ɔn]sit in on的美式发音音标为：[sit ɪn ɑn]...