经济增长和环境责任之间的平衡是我们这个时代的决定性挑战。
The balance between economic growth and environmental responsibility is the defining challenge of our time.
The greatest rewards come from working the hardest and not giving up.
The unity of mathematics is not an illusion but a reality waiting to be uncovered.
领导力意味着今天做出艰难的决定，明天让所有人受益。
这是最好的时代，这是最坏的时代。