检验统计假设的问题由来已久，其起源已不可考。
一个好的布道是激情对话的一面。
The purpose of life is to live it, to taste experience to the utmost, to reach out eagerly and without fear for newer and richer experience.
The journey of discovery is filled with uncertainties, but it is these uncertainties that make science so exciting.
在孩子的生命中，没有什么可以替代书籍。
The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome given the alternatives.