Babies start smiling as newborns: Most doctors believe that real smiles occur when babies are awake at the age of four-to-six weeks, but babies start smiling in their sleep as soon as they're born.
2
她长得很可爱，卷卷的头发，婴儿的皮肤，天使的笑容。
She is a lovely girl, with curl hair, baby skin, and smiles like an angel.
3
他们表示，如果婴儿的妈妈对他们做了一些他们很喜欢的事情，他们就会露出笑容。
They say a baby will smile if her mother does something the baby likes.
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