The anarchic nature of the international system forces states to compete for power.

If you want to lead, you must first learn to listen—to your team, your customers, and the environment.

L-函数的研究是探索数字隐藏结构的窗口。

The most exciting, challenging and significant relationship of all is the one you have with yourself.

Coal has been the backbone of industrial progress, but its future must balance economic needs with environmental responsibility.