Before six-month-olds, Piaget observed, you take an object the kid likes like a rattle, you hide it, you put it behind something, it's like it's gone.

皮亚杰发现,在六个月之前,你将婴儿喜欢的物体,比如说拨浪鼓,藏起来,隐藏在某物的后面,就像这东西消失了一样

耶鲁公开课 - 心理学导论课程节选

So if you try to find out a little bit more of like the philosophy behind this language,

所以如果你努力找出一些类似语言背后的哲学之类的东西，

学外语的时候 - SpeakingMax英语口语达人