You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.
Sustainability isn't a trend—it's a responsibility we all share.
真假的问题始终存在，但并不总是可以回答的。
数据是非常愚蠢的；它们不会告诉你任何关于因果关系的信息。