from mother to child. She noted a United Nations report that in two thousand eight about four hundred thirty thousand babies were born with H.I.V.

VOA: special.2010.05.24

These studies were done in France with four-day-old babies.

这些实验在法国对四天大的婴儿进了研究

耶鲁公开课 - 心理学导论课程节选

"Those are the babies who are born between thirty-four and thirty-seven weeks gestation.

VOA: special.2009.10.26

Six-week-old babies generally breastfeed seven to nine times in a twenty-four-hour period.

VOA: special.2010.08.04