"It's a horizontal motion of two pieces of the Earth's crust on either side of a vertical crack in the Earth,"

VOA: standard.2010.01.13

What the whole note is, what all these symbols are are simply representations of duration so we have a symbolic language here that's going to represent the horizontal axis the axis of duration.

什么是全音符,这些符号又都是什么呢,这些就是简单代表了持续时间,因此我们这里有一套符号语言,来代表横轴,就是时值的那条轴

耶鲁公开课 - 聆听音乐课程节选

Excuse me. So what I'm going to do is, let's draw a picture that has S1 on the horizontal axis and S2 on the vertical axis.

好了,我们接下来来绘制图像,S1是横轴,S2是纵轴

耶鲁公开课 - 博弈论课程节选