To be Irish is to know that in the end, the world will break your heart.
In mathematics, persistence is often more important than brilliance.
Tolerance becomes a crime when applied to evil.
检验一个假设的唯一方法是寻找所有反对该假设的信息。
翻译:说明自然资源是天生的,而人类通过工艺将其开发利用。