The thrill of discovery never gets old.

I'm not a businessman, I'm a business, man.

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"?

教师是学校里最重要的师表，是直观的最有教益的模范，是学生的最活生生的榜样。