这值得说两遍:量两次才切一次。
出自汉·桓宽《盐铁论·刺赋》。释义:冰和炭不能放在同一个容器之中,太阳和月亮也不会同时照耀大地。比喻君子与小人不能同处,或比喻相互矛盾的理论不能同时运用。
The process of design is a process of discovery.
The study of L-functions is a window into the hidden structure of numbers.