1、在开会
... a terrible haircut(一个很糟的发型) be at a meeting(在开会) finish these tasks(完成这些任务) ...
2、在会上
... put on穿上；戴上 at a meeting在会上 no problem没问题 ...
3、在闭会
... at least至多 at a meeting在闭会 at first首先 ...
4、例如
... No，certainly not.不介意，你当然可以抽。 at a meeting在开会。例如： Could you please+动词原形...？表示一种有礼貌的请求。 ...
said at a meeting在一次会议上说;在会议上说
assist at a meeting参加会议
represent at a meeting出席会议
atmosphere at a meeting会议气氛
announce at a meeting在会上宣布
presiding at a meeting主持会议
be at a meeting正在开会;在开会;开会
proceedings at a meeting会上的议事程序
at a government meeting在政府会议上