The most important single central fact about a free market is that no exchange takes place unless both parties benefit.
自由市场最重要的一个核心事实是，除非双方都受益，否则交易不会发生。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
To be sane in a world of madmen is in itself madness.
Sustainability isn’t an option; it’s the only path forward for agriculture.
Existence is a risk, but non-existence is also a risk.
A play is fiction—and fiction is fact distilled into truth.