This grid of horizontal lines, and we will know that if we're going from here to here, it's got to be exactly this frequency, or at least this space.

这个水平线组成的网格,让我们知道,从这里到这里,正好是这样的频率,或者至少是这个间隔

耶鲁公开课 - 聆听音乐课程节选

The lines will get shallower and eventually become horizontal and vertical respectively.

直线会变得更平缓,最后会分别变成水平和垂直两种情况

耶鲁公开课 - 博弈论课程节选