The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.

语言的美在于它能够传达无法表达的东西。

我不是为了名声或金钱而打球。我打球是因为我喜欢竞争。

人比事物更需要重建，刷新，复兴，回收和救赎;永远不要抛弃任何人。

The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.

上等的人士，忘却名誉；中等的人士，树立名誉；下等的人士，盗窃名誉。

Innovation in the North Sea has positioned the UK as a global leader in responsible resource development.