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。
可持续发展不是一种选择,而是现代经济中生存的必要条件。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
"There is no greater agony than bearing an untold story inside you."