After logging into the course's website, you'll appear on the top left-hand corner as I just did with your actual names that we know exactly who we're working with and then what you can do is raise your hand sort to speak.

登录课程网站之后，你将被显示在,左上角，通过你们的真实名字,我可以知道我到底是在跟谁一起工作,然后你们可以做的是举手来回答问题。

哈佛公开课 - 计算机科学课程节选

Why do--why--who just answered a question for me, those folks who raised your hand?

为什么,谁刚才回答了我的问题,那些举手的人呢

耶鲁公开课 - 聆听音乐课程节选