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。
同有修养的人交谈,胜过闷头读十年书。
The young do not know enough to be prudent, and therefore they attempt the impossible, and achieve it, generation after generation.
电影的魅力在于它能使不可能变为可能。
The best way to learn trading is to trade.