The meetings are always in the main conference room.

会议总是在主会议室举行。

《牛津词典》

In the main conference, I estimate that over 600 people were attending the lectures.

在主会场，我估计有超过600人参加了讲座。

youdao

After this presentation, we'll have lunch, which is served in the main conference hall.

推介会之后，我们吃午饭，午饭在大会厅内。

youdao

The conference centered on three main problems to getting and keeping girls in school: violence,poverty and poor quality education.

VOA: special.2010.05.20

On this issue, another tale from India, told at the WEF main conference in January, is worth recalling.

CNN: Just do it

But in the meantime he has to find a line that holds, perhaps in his main conference speech on October 10th.

ECONOMIST: Too little Hagueography

Wales manager John Toshack admitted in his pre-match press conference that the main reason the game against Scotland was being played was to try out the new 26, 500 capacity Cardiff City Stadium.

BBC: Easter urges Wales to look ahead