悲伤和易怒可能出现在任何年龄层，从婴儿到白发苍苍的老人。
Sadness and irritability can occur at any age from infancy to very old age.
该中心正在从事一些项目的工作，主要研究从婴儿到儿童的认知发育。
The center is working on a variety of projects exploring cognitive development from infancy through childhood.
从婴儿到小孩、到青少年、再到年轻女士——万事俱备，使得她在服务于自然界与人类家庭上迸发出一种惊人的能力。
The babe, the child, the adolescent, the young woman-all their strengths were harnessed into a force of astonishing power that placed itself in the service of nature and the human family.
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