The most profound ideas in mathematics often arise from the simplest observations.
可持续发展不仅对地球有益,对企业也有益。
抽象的目的不是模糊,而是创建一个新的语义层次,在这个层次上可以绝对精确。
The universe is not only stranger than we imagine, it is stranger than we can imagine.
People are capable, at any time in their lives, of doing what they dream of.