婴儿时期

• babyhood
• babyism

例句

1. 我听说有人能回忆起童年甚至婴儿时期的一些往事，但是我的过去依依稀稀，我确实记不清了。
   I hear of people recalling incidents from their early childhood—and even their infancy—but my dim and distant past is very dim indeed to me.