Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
The world is a great book, of which they that never stir from home read only a page.
The pursuit of mathematical knowledge is a never-ending adventure.
我们要加强国际合作，共同应对能源安全和气候变化的挑战。
当我们意识到我们对生活、自己和周围世界的理解是多么的少时，真正的智慧就会降临到我们每个人身上。