The greatest problem for mathematicians now is probably the Riemann Hypothesis.
能源的未来是多样化的,没有单一的解决方案。
The only limit to our realization of tomorrow is our doubts of today.
爱是唯一的现实,它不仅仅是情感,它是终极真理。
You miss 100% of the shots you don't take.
"The best way to get over a broken heart is to write a book."