•a conference on women's rights妇女权利大会

•They frequently hold conferences at that hotel.他们常在那家饭店举办会议。

•I'm speaking at/attending a conference next week.我下周要在一个会议上发言／出席一个会议。

•Should I book the conference room for the meeting?我要为会议预订会议室吗？

•Ms O'Neill isn't available at present. She's in conference.奥尼尔女士现在不在，她正在开会。