数学的本质在于它的自由。
"The essence of mathematics lies in its freedom."
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
广告不会创造产品优势。它只能传达它。
"Happiness is not the absence of problems but the ability to deal with them."
"The unexamined life is not worth living."
"The act of writing is an act of resistance against forgetting and oblivion."
音乐是生命阴郁夜晚中的月光。