名词

1. 婴儿期;幼年
Infancy is the period of your life when you are a very young child.

2. 初期;初创阶段
If something is in its infancy, it is new and has not developed very much.

1. the earliest state of immaturity

Synonym: babyhood

2. the early stage of growth or development

Synonym: babyhoodearly childhood