—— 请按键盘 空白键 开始游戏 ——

The interplay between theory and observation is what advances astrophysics.
眼睛是什么也看不见的,一定要用心去看。
The world is in a constant state of flux. Nothing remains the same from one moment to the next. You can never step into the same river twice.
The only way to get rid of a temptation is to yield to it.