Never give up. Today is hard, tomorrow will be worse, but the day after tomorrow will be sunshine.
诗是一种理解世界的方式,而不仅仅是解释它。
Politics has no permanent friends or enemies, only interests.
发现不是一条直线;它充满了曲折和惊喜。
在数学中,发现的旅程往往比目的地本身更有价值。