—— 请按键盘 空白键 开始游戏 ——

The world is a very complicated place, and it's not getting any simpler.
"The act of writing is an act of courage, a confrontation with the self."
Never compromise on safety - it's the cornerstone of our industry.
数学的本质不是把简单的事情复杂化,而是把复杂的事情简单化。