Scientists agree that musical instruments are a sign of fully modern behavior and a complex form of communication.

VOA: special.2009.08.18

In particular, please go to it today, you will find a form there that you need to fill out to register for, or sign up for rather, a recitation.

特别声明，请今天就去看，你会找到需要填写的,一份注册表单，或者是复习课的签到表单。

麻省理工公开课 - 计算机科学及编程导论课程节选

But there's a catch, the catch is, that that means you have to sign that legal release form.

但是这会有个条件,你们都要签署授权书

耶鲁公开课 - 博弈论课程节选

So you'll see that you have in front of you a legal release form, you have to be able to sign it, and what that says is that we can use you being shown in class.

你们的面前应该有张授权书,授权书的大概内容是,允许我们把你拍摄进来

耶鲁公开课 - 博弈论课程节选