有些天性太过顽固而无法抑制，太过傲慢而不能屈服。
The first lesson of economics is scarcity: There is never enough of anything to satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics.
Success in the aggregates industry is not just about moving rocks; it's about moving the economy forward.
If your goal does not have a schedule， it is a dream.
Psychology as the behaviorist views it is a purely objective experimental branch of natural science.
行为主义者眼中的心理学是自然科学的一个纯粹客观的实验分支。
The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome of the process of modernization.
有时最简单的问题会引出最深奥的理论。