assembly, conference, congress, rally, seminar, session, summit, symposium这一组名词都表示“会议”的意思。
assembly n.集合，集会。
the assembly of students takes place in the auditorium.学生们在大礼堂举行集会。
conference n. (专门性的)会议，讨论会。
the conference on international economic problems met in geneva
a.关于世界经济问题的会议在日内瓦召开。
congress n.代表大会，(美国的)国会。
congress passes laws that must be obeyed by the people.
美国国会通过的法律，人民一定要遵守。
rally n. (鼓舞士气的)集会；群众性集会。
the football coach called a rally to build up the team's excitement for the next game.
足球教练召开了一个动员会，以便鼓舞士气打好下次比赛。