translation.en: of this recent origin of modern humans is that genetic variants are generally distributed widely in the world, in many places, and they tend to vary as gradients, from a bird's-eye perspective at least.
translation.zh: 现代人近期起源的 另一个结果 是基因变异 在世界上广泛分布 到很多地方 至少从总体上看 基因变异的走势成斜线状 既然存在如此多的基因变异