You take a nine-month-old and for Piaget a nine-month-old is just starting to make sense of objects and their permanence.

你找到一个九个月大的婴儿,在皮亚杰看来,九个月大的婴儿才刚刚发展出,客体以及客体永存性的概念

耶鲁公开课 - 心理学导论课程节选

Now we'll play a passage of Mozart-- a symphony by Mozart here that he wrote at the ripe old age of nine years.

现在我们要放的这个片段来自莫扎特-,这首交响曲是莫扎特在九岁那年写的。

耶鲁公开课 - 聆听音乐课程节选

A child eight or nine years old with what used to be called Adult Onset Diabetes.

岁或者9岁的小孩,竟然得了曾称为成年始发性糖尿病的疾病

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Milton's nearly twenty-nine years old when he writes Lycidas.

写《利西达斯》的时候弥尔顿将近29岁了。

耶鲁公开课 - 弥尔顿课程节选

She looks about nine-years-old; she may have been 12 or 13.

她看起来大概9岁,可能已经12 13岁

耶鲁公开课 - 美国内战与重建课程节选

Welles's mother died when he was nine years old.

威尔斯的母亲在他9岁的时候就死了。

麻省理工公开课 - 电影哲学课程节选