baby 和infant 和toddler区别
baby ，infant ，toddler都有表示“婴儿”的意思，还有一个newborn也是这个意思。四者是有区别的。
解释如下：
An infant (from the Latin word infans,meaning "unable to speak" or "speechless") is the veryyoung offspring of a human or other mammal. When applied to humans, the term isusually considered synonymous with baby, but the latter is commonly applied tothe young of any animal. When a human child learns to walk, the term toddlermay be used instead.
The term infant is typically applied toyoung children between the ages of 1 month and 12 months; however, definitionsvary between birth and 3 years of age. A newborn is an infant who is onlyhours, days, or up to a few weeks old. In medical contexts, newborn or neonate(from Latin, neonatus, newborn) refers to an infant in the first 28 days afterbirth; he term applies to premature infants, postmature infants, and full terminfants. Before birth, the term fetus is used.
Infant is also a legal term referring toany child under the age of legal adulthood.
总结一下：baby适用于所有动物，infant特指人类小孩，开始学走路的小孩叫toddler. infant指1-12个月的小孩，有时也指出生到3岁的小孩。newborn指几个小时或者几天或者几周大的infant。医学上认为newborn是出生28天之内的小孩。
tot,baby,infant,toddler有什么区别
tot、baby、infant、toddle的区别：1、baby泛指的是1～4岁的小孩。2、newborn指3个月或不到3个月的。3、infant指3个月～1岁的。4、toddler指1～4岁的。拓展资料totI finally sat down to tot up the full extent of my debt 我终于坐下来把我的全部债务合计了一下。2、Now tot up the points you've scored. 现在把你所得的分数相加。3、With gin at 9p a tot, getting plastered is cheap and easy. 一小杯杜松子酒只要9便士，灌醉自己即便宜又容易。4、The paper explains the countermeasures, such as raising auditing awareness, adjusting auditing system and adapting tot. 从提高审计意识、调整审计体制、适应审计发展趋势三个方面探讨了解决上述问题的对策。baby1、She used to take care of me when I was a baby 我还在襁褓中时，她曾经照顾过我。2、Serve with baby new potatoes. 配上小个的新土豆。3、You have to wake up now, baby 该起床了，宝贝儿。4、You go off round the world, and leave me to hold the baby. 你满世界地跑，把苦差事都扔给我。infant1、The family were forced to flee with their infant son. 那家人被迫带着他们尚在襁褓中的儿子逃走了。2、The infant company was based in Germany. 这家新公司总部在德国。3、The nation's infant mortality rate has reached a record low. 该国的婴儿死亡率已降至历史最低水平。4、The United States ranks 20th in its infant mortality rate. 美国在婴儿死亡率方面排名第20。