I will start the ball rolling by introducing the first speaker.

我来介第讲者作为开始。

Angry crowds converged on the speaker.

愤怒的群众向讲者拥去。

The speaker shall limit himself to several aspects of the subject.

这讲者将从几个方面来发表对这个问题的看法。

The students enjoyed the speaker so much that the clapping continued for a long time.

"同学们非常欣讲者的讲,掌声经久不息。"

Forgetting his speech disconcerted the speaker.

忘了讲词使得这讲者手足无措。