Freedom is not the power to do what we want, but the right to do what we ought.
Books say: She did this because. Life says: She did this. Books are where things are explained to you; life is where things aren’t.
NP完全性不仅仅是一个理论上的好奇心;它对实际计算有着深远的影响。
Quality is remembered long after price is forgotten.
跨国合作对解决全球粮食安全挑战至关重要。