translation.en: But they do it recursively, and they do it with an age-grade system, so the little kids learn this one, and then the older kids learn this one, then the next age-grade initiation, you learn this one.
translation.zh: Chokwe人反复学习绘图，并根据年龄区分他们所学的内容： 因而幼龄的孩子学习这个，稍年长的学习这个， 再下一个年龄层的，学习这个。