从进化论的角度看,任何生物体的主要目标都是繁殖后代。
In evolutionary terms, the primary goal of any organism is to produce ___offspring.
她现在是我孩子的母亲,我深深珍视我们的家庭。
She is now the mother of my ___offspring, and I cherish our family deeply.
科学家研究了该动物后代在自然栖息地中的行为。
The scientist studied the behavior of the animal's ___offspring in their natural habitat.