Sustainability isn't just a buzzword—it's the foundation of responsible forestry. We must balance economic growth with environmental stewardship.
元素周期表是现实构建模块的地图。
I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.
预见数学未来的真正方法是研究它的历史和现状。