It listens to the lecture, and then it uses the amplitude of each word to move a point on the x-axis, and it uses the inflection of sentences to move a same point up and down on the y-axis.
它一边听讲座,然后它利用 每个词的振幅去在X轴上来回移动 它还利用句子之前的变调 从而在Y轴上上下移动