农业的真正进步是用健康衡量的，而不仅仅是产量。
Recursion is the root of computation since it trades description for time.
Economic history teaches us that change is possible, but it is rarely easy.
当你热爱你所做的事情时，获得动力并不难。
我们教授一门学科不是为了培养关于该学科的小型活图书馆，而是让学生自己学会数学思考。
病毒的复杂性提醒我们，关于生物学我们还有很多需要学习。
The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.
The science of government it is my duty to study, more than all other sciences; the arts of legislation and administration and negotiation ought to take the place of, indeed exclude, in a manner, all other arts.
A well-designed home should tell a story about the people who live there.