Then he'd write on a little note " and hand it to the guy and say just keep this note.

之后金匠会将其记录到一张票据上,交给他个人并且对他说：“保留好这张票据。

耶鲁公开课 - 金融市场课程节选

So every gesture of the hand is going to be the equivalent of a quarter note.

那么,每个手部的动作,都相当于一个四分音符

耶鲁公开课 - 聆听音乐课程节选