会议以主讲人的介绍开始。

The conference started with introductions from the keynote speakers.

会议的主讲人站在讲台上。

The keynote speaker stood on the platform.

基廷将成为即将到来的研讨会的主讲人。

Keating will be the keynote speaker at the upcoming seminar.

当主讲人没有出现时，计划完全搞砸了。

The plan went fubar when the main speaker didn't show up.

主讲人：4英寸直径的。

Speaker: 4 inch dia.

我的天啊你真的要我当主讲人吗？

Oh, my God, you really want me to be the keynote speaker?

在这里，它指主讲人演讲对象的感知。

You know what happens to the keynote speaker.

主讲人是山东大学微软俱乐部技术部部长张剑楠.

The speaker was Zhang Jiannan , minister of technology department of MSTC of Shandong University.

主讲人董长英先生长期研究新加坡木刻版画艺术。

The speaker Mr. Tong Siang Eng is a long-time researcher of woodcut art in Singapore.

我要花一点时间感谢今天的主讲人，哈特先生和格雷女士。

I want to take a minute to thank the keynote speakers, Mr. Hart and Mrs. Grey.