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

I was so proud of myself getting the lecture notes finished early and handing them in to CopyTech, and then I realized we didn't do electronegativity on Wednesday.

我感到很自豪,对自己能够提前做完讲义,并交给复印中心但是之后我才想起来,我们周三没有讲电负性。

麻省理工公开课 - 化学原理课程节选