—— 请按键盘 空白键 开始游戏 ——

I am always glad to think that my education was, for the most part, informal, and had its roots in the real world.
我总是很高兴地想到,我的教育大部分是非正式的,并且根植于现实世界。
理论与观测之间的相互作用推动了天体物理学的发展。
The most important thing in trading is to manage risk.
怀疑是智慧的开始。