infancy

1. N-UNCOUNT Infancy is the period of your life when you are a very young child. 嬰兒期

...the development of the mind from infancy onwards. …從嬰兒期開始的智力開發。

2. N-UNCOUNT If something is in its infancy, it is new and has not developed very much. 初期

Computing science was still in its infancy. 計算機科學仍然処於初期堦段。