城市的穷人就像树的根；看不见，但对它的生命至关重要。

男人的面孔是他的自传，女人的面容是她的幻想作品。

The essence of mathematics lies in its power to reveal patterns and symmetries.

"Theoretical computer science is a field where deep mathematical insights lead to practical computational tools."

预测未来的最好方法就是去创造它。