The child starts off grasping the world only in a physical way, in a sensorimotor way, but when he gets to the preoperational period, the capacity to represent the world, to have the world inside your head, comes into being.

开始的时候,儿童只能通过生理的方式,通过感知运动的方式,来认识世界,但是当儿童进入了前运算阶段,他们便逐渐拥有了表征事物,在头脑中构建世界的能力

耶鲁公开课 - 心理学导论课程节选

And I don't want to overplay the social importance of this, but go back a couple of years to what was happening in the aftermath of Katrina and realize how bad things get when things fail to be coordinated.

我不想再过分的强调它的重要性,不过我们不妨回顾一下几年前,卡特里娜飓风的灾后过程,就会认识到缺乏协调沟通是多么可怕

耶鲁公开课 - 博弈论课程节选