天然气是通往更清洁能源未来的桥梁，但我们必须负责任地跨越这座桥梁。

某个命题可以从某一组公理通过某一规则系统推导出来，这一事实本身并不使其为真。

最成功的品牌是那些忠于自身价值观同时与时俱进的品牌。

我相信我们都应该努力对世界产生积极的影响。

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.