Mathematics is the queen of the sciences.
国家是理性的行为体,它们寻求最大化相对权力,以确保在竞争性的国际体系中生存。
Dairy farming is both an art and a science—respecting both is essential for success.
心灵可以被视为一个物理符号系统。
"History is not what happened, but what we remember and how we remember it."