Psychology must be based on observable facts, not speculation.
城市是我的主题。它对我来说是无穷无尽的魅力。
预测未来的最好方法就是创造未来。
Food security is a global issue that requires local action.
The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.
A sustainable coal industry is possible if we commit to the right technologies.