数学的本质在于它的自由。

I quite agree with them that it is not an ennobling experience. Poverty entails fear, and stress, and sometimes depression; it means a thousand petty humiliations and hardships. Climbing out of poverty by your own efforts, that is indeed something on which to pride yourself, but poverty itself is romanticised only by fools.

永远不要在亚洲陷入地面战争。

在当今世界，数字技能和读写能力一样重要。

The Internet is the most important single development in the history of human communication since the invention of the printing press.