反对森林砍伐的斗争是为人类的未来而战。
The challenge for modern states is to maintain their legitimacy while also being effective in providing services and maintaining order.
煤炭不仅仅是一种商品，更是现代文明赖以建立的基础。
真实不是可知的，但是它是可体验的。
International politics is a brutal and unforgiving arena, where states constantly strive to maximize their power and security.