如果你想看看这个国家的本质,你必须乘坐铁路。当你快速穿过时,看看外面,你会发现美国的真实面貌。
En cada palabra escrita hay un pedazo del alma del autor.
We've been through a lot together, and that's what makes us stronger.
我永远相信,只要坚持,就一定能成功。
To be able to find joy in another's joy: that is the secret of happiness.
The concept of computational complexity is not just about how fast we can compute, but also about understanding the limits of what can be computed.
——1963年6月25日在西德市政厅柏林墙前的演说