计算复杂性的本质是理解什么可以被有效地计算的极限。
The essence of computational complexity is to understand the limits of what can be computed efficiently.
我发现自己一直会担忧明天，当明天变成今天时，我又开始担忧起明天来。
真相很少纯粹，也绝不简单。
质量不是运气；它是一种策略。
Leadership plays a crucial role in diplomacy, and good leadership can guide a team to address complex international challenges.
In a state, one man's liberty ends where another's begins.