The concept of law is essentially a matter of social fact.
政策辩论应以严格的实证分析为基础。
Quantum algorithms have the potential to revolutionize fields such as cryptography and materials science.
翻译：权势与利益捆绑的关系终究脆弱，交友当重品性与真心，这样的情谊才能经住风雨。
The truth is rarely pure and never simple.