translation.en: The measure we've used, because it's easy to understand and you can download it, is how much richer the top 20 percent than the bottom 20 percent in each country.
translation.zh: 我们用的方法， 简单易懂，并且你们可以下载， 就是比较每个国家的前 20% 与后 20% 的收入差距。