一个好的数学问题的定义是它产生的数学,而不是问题本身。
The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
The world is full of magic things, patiently waiting for our senses to grow sharper.
幸福是短暂的。它不会停留。上帝在击打它的风帆。
除非你付出努力,否则梦想不会实现。