人生而自由,却无处不在地受着枷锁。
There is no perfect knowledge which can be entitled ours, that is innate; none but what has been obtained from experience.
第一次与巴尔蒂人喝茶,你是陌生人;第二次,你是尊贵的客人;第三次,你成为家人。
"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."