infant

/ˈɪnfənt/

a very young child (birth to 1 year) who has not yet begun to walk or talk

中文释义：婴儿；幼儿

Proper nutrition is crucial for an infant's brain development during the first year.

适当的营养对婴儿第一年的大脑发育至关重要。

The hospital provides special care units for premature infants who need constant monitoring.

医院为需要持续监护的早产婴儿提供特殊护理单元。