In international trade, a country should specialize in the production of goods for which it has a comparative advantage, and trade with other nations to maximize overall economic welfare.
音乐是我的逃避。
科学的美丽在于它不断发展和挑战我们对世界的理解的能力。
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
沟通中最重要的是听到没有说出来的话。