And we need to form an even stronger partnership to bring down the walls of the 21st century and to confront those who hide behind them the suicide bombers, those who murder and maim girls whose only wish is to go to school, leaders who chose their own fortunes over the fortunes of their people,".

VOA: standard.2009.11.09

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

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