What is freedom of expression? Without the freedom to offend, it ceases to exist.
The beauty of mathematics lies in its simplicity and depth.
We need diversity of thought in the world to face the new challenges.
你做得越多,学到的就越多。你学到的越多,你能做的就越多。
世界上最好和最美丽的东西是看不见甚至摸不到的 - 它们必须用心去感受。