国际体系的结构，而不是个别国家的意图，是国家行为的主要决定因素。
The structure of the international system, not the intentions of individual states, is the primary determinant of state behavior.
你能做的最好的投资就是投资自己。
Sustainability is the future of farming, and those who ignore it will be left behind.
In every problem, there is a hidden pattern waiting to be discovered, and it is our duty as mathematicians to uncover it.
能量守恒定律是经验结果的概括。