Cows, pigs, wars, and witches are not arbitrary cultural preferences but adaptations to material conditions.
牛、猪、战争和巫术并非任意的文化偏好，而是对物质条件的适应。
Survival can be summed up in three words – never give up. That’s the heart of it really. Just keep trying.
世界不是一个愿望实现的工厂。