n.说话者;演讲者,发言人;讲某种语言的人;扬声器;
例句:
a native speaker of English
以英语为母语的人
In the course of things men of other ideas came to rule.
按事物的循环,总是由有新思想的人起来执政.
She was a brilliant public speaker .
她很擅长在公开场合演讲。