The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?

Collaboration across industries is key to solving the world's most pressing challenges.

书籍是最安静、最恒久的朋友；它们是最易接近、最睿智的顾问，也是最耐心的老师。