做数学就是同时参与创造和发现的行为。
To write is to choose between silence and lies.
名称没有本来就合适的,而是由人们共同约定来命名的,约定俗成就是合适的,与约定不同的就是不合适的。
What you don't do determines what you can do.
Efficiency in resource use isn’t just good for the planet—it’s good for business.