你是唯一能做出改变的人。无论你的梦想是什么，去追求它。
You are the only one who can make the difference. Whatever your dream is, go for it.
"History is not just facts and dates; it’s the lives of people who lived them."
Don't be afraid of failure when facing challenges. Every failure is a step towards success.
统计学家的目标是从样本中推断出总体是什么。
The act of writing is an act of courage.
国家是理性的行为者，在无政府状态的国际体系中寻求最大化其权力和安全。