translation.en: And you start to plot the data, because, by this approach, the big stories, the big developments in human history, are the ones that will bend these curves a lot.
translation.zh: 将这些数据转化为图标之后， 就可以看到人类历史上的重要事件和伟大发展， 都会对这些曲线造成明显的变化。