an infant
注意：infant 是正式或医学用语，日常口语更常用 baby。
An infant needs round-the-clock care.
婴儿需要全天候的照顾。
婴儿
infants — plural of infant
非常年幼的人类,从出生到出生后六个月到两岁之间,需要几乎持续的照顾和关注；未满一岁尚不会走路或说话的婴儿；未成年人；儿童；初学者
a very young child who cannot yet walk or talk
非常年幼的人类,从出生到出生后六个月到两岁之间,需要几乎持续的照顾和关注
A very young human being, from birth to somewhere between six months and two years of age after birth, needing almost constant care and attention.
未满一岁尚不会走路或说话的婴儿
a very young child (birth to 1 year) who has not yet begun to walk or talk
未成年人
A minor.
The infant slept peacefully in her mother's arms.
婴儿在母亲怀里安静地睡着了。
用法提示：infant 在这里是名词，指幼小的婴儿，作主语。
Many infants begin to smile at around two months old.
许多婴儿大约两个月大时开始微笑。
用法提示：infants 是 infant 的复数形式，作名词主语。
The doctor carefully examined the infant during the morning checkup.
医生在早晨体检时仔细检查了这名婴儿。
用法提示：infant 是名词，作动词 examined 的宾语。
注意：infant 是正式或医学用语，日常口语更常用 baby。
An infant needs round-the-clock care.
婴儿需要全天候的照顾。
The newborn infant was sleeping peacefully.
新生婴儿正在安详地睡觉。
The infant's health is monitored closely.
婴儿的健康状况受到密切监测。
最通用，与 infant 基本同义，但更口语化
特指出生后不久的婴儿，比 infant 时间范围更窄
医学术语，日常不常用
文学或圣经用语，现代口语极少使用
grammar · medium
易错句子She has two infant.
正确表达She has two infants.
infant 是可数名词，表示“婴儿”，复数形式为 infants。错误句子中使用了单数形式，但数量为 two，应改为复数。
grammar · medium
易错句子He is a three-year-old infant.
正确表达He is a three-year-old child.
infant 特指从出生到一岁左右的婴儿，三岁的孩子已经不是 infant，应使用 child 或 toddler。
infant专指未满一岁尚不能行走的婴儿；baby泛指从出生到两三岁的孩子，更口语化
infant指不能行走的婴儿；toddler指已学会走路但尚不稳的1-3岁幼儿
infant涵盖0-1岁；newborn特指出生后几周内的婴儿
婴儿死亡率
The country has reduced its infant mortality rate significantly in recent years.
该国近年来大幅降低了婴儿死亡率。
婴儿配方奶粉
Many mothers choose to feed their babies with infant formula.
许多母亲选择用婴儿配方奶粉喂养宝宝。
婴儿提篮
She carried the baby in an infant carrier.
她用婴儿提篮抱着宝宝。
婴儿喂养
Proper infant feeding is crucial for healthy growth.
正确的婴儿喂养对健康成长至关重要。
婴儿发育
Early stimulation can promote infant development.
早期刺激可以促进婴儿发育。
婴儿座椅
The car is equipped with a rear-facing infant seat.
这辆车配备了后向式婴儿座椅。
in- (not) + fant (speak) → one who cannot speak
in- + fant + -ile (adjective suffix)
in- (not) + active
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.