translation.en: And the mathematicians and scientists in the crowd will recognize these two progressions as a first-order discrete differential equation and a second-order discrete differential equation, derived by six-year-olds.
translation.zh: 在座的数学家和科学家应该知道 这两种演变之名称分别为 一阶微分方程 和二阶微分方程 而这居然被6岁的孩子发现了