sprawling adj. 不规则伸展的;蔓生的
frivolous adj. 无聊的;琐碎的
gross revenue 收入总额;营业总额
speculative adj. 思索性的
venture v. 冒险;投机
expertise n. 专门知识;专业技术
yield v. 生产;产出
jade v. 使疲倦
rotate v. 使轮流
potent adj. 有效的;强有力的
put a premium on 重视;奖励;鼓励
rigorously adv. 严厉地;残酷地
censorship laws 审查立法
Question time:
1. What's people's stereotype of the root of creativity?
2. why young people tend to be the most innovative thinkers in nearly any field?
3. How to be more creative according to Mr Lehrer's conclusion?