In all things, it is necessary to create a system.
真相很少是纯粹的,也从不简单。
每一次的努力都是对未来的投资,智者明白这一点。
The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.
穷人面临的约束往往是政策制定者看不到的。
利用不同的感官刺激,有条不紊地将注意力引导到儿童的活动甽,即便是嗅觉也可以用理解的方式来训练,从而成为他们探索环境的器官。
The pursuit of mathematical truth is a never-ending adventure.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.