Ron：Have you met Raj, the student from India？

Emily：No, I haven’t.

Ron：Well, he seems really nice，but there’s one thing I noticed. He moves his head from side to side when you talk to him. You know, like this.

Emily：Maybe it means he doesn’t understand you.

Ron：No, I don’t think so.

Emily：Or it could mean he doesn’t agree with you.

Ron：Actually，people from India sometimes move their heads from side to side when they agree with you.

Emily：Oh，so that’s what it means！