I'd sit in meetings, fretting about what was happening at home.我列席会议，心里却在为家里的事发愁。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。We want you to sit in on the meeting.我们希望你列席会议。She's been asked to sit in on the meetings.她被邀请列席会议。