The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
美丽的眼睛能发现他人身上的美德,迷人的嘴唇能吐露善意的话语,优雅的姿态是因为了解自己不是孤立独行。
永远不要让任何人告诉你你做不到某件事。
The soul needs only one thing: to do what the body is doing.