"In observational studies, we often have to rely on assumptions that are not directly testable."

团队合作是成功的基础，没有任何伟大成就是独自完成的。

The universe will change if you bring up your children, in behavioristic fashion, to be unafraid.

真正的创新源于理解消费者未被满足的需求，并有勇气采取行动。

出自汉·桓宽《盐铁论·力耕》。穿衣吃饭是人民生活的根本所在，不可以不慎重的对待。