一个从不退缩，而是勇往直前的人，从不怀疑乌云会散去。
Every time a coal plant closes, a piece of America's heart closes with it.
The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.
To live is to suffer, to survive is to find some meaning in the suffering.
Happiness is a good flow of life； the conviction that you are taking part in the universe's purpose.