translation.en: And what if I do this progression that the six-year-olds did of saying, "OK, I'm going to increase the speed by two each time, and then I'm going to increase the distance by the speed each time?
translation.zh: 6岁的孩子就会问 要是我每次增加2英里 又会出现什么？ 那个路程上又会增加多少呢？