Labor that cannot satisfy the happiness of humanity is creatural labor, and is a low-class labor that satisfied the biological need only. 不能满足人性快乐的劳动是动物性质的劳动，是追求满足生理需要的低级劳动。
The term is sometimes used instead of ECOTYPE, for groups of individuals that have uniform ecological preferences or physiological requirements. 这一术语可被生态型代替，表示一组具有一致生态和生理需要的个体。
