Natural selection also explains many basic revulsions, such as the horrid smell of rotting meat, or fears, such as the fear of snakes or standing close to the edge of a cliff.
自然选择也解释了 许多本能性的恐惧和反感， 比如腐肉的可怕的气味， 比如对蛇的惧怕 或站在悬崖边缘的恐惧。