be present at a meeting出席會議;蒞會
be at a meeting正在開會;在開會;開會
be discussed at a meeting會上討論
At a meeting in在來一次
I was at a meeting我正在開會
announce at a meeting在會上宣布
atmosphere at a meeting會議氣氛
they're at a meeting他們正在開會
said at a meeting在會議上說;在一次會議上說