I'm not working alone here, but we have three teaching fellows who are affiliated with the course, two of which are here today.

我并不是一个人讲授这门课,有三位助教,与我并肩战斗,今天有两位在这里

耶鲁公开课 - 生物医学工程探索课程节选

There are nine keys for my left thumb alone so I'm kind of switching between these on the back here and many others, and because of that I can go very high and I'll just demonstrate that.

我的左手拇指就要控制九个音键,通过按动后部,和其他地方的音键,我就能吹出很高的音,我现在就来演示

耶鲁公开课 - 聆听音乐课程节选