—— 请按键盘 空白键 开始游戏 ——

在每一本书中,都有作者灵魂的一部分。
Designing markets requires both economic theory and practical intuition.
The principles of conditioning apply equally to all species.
宇宙不仅比我们想象的更奇怪,它比我们能想象的还要奇怪。
The challenge for media companies is to find new ways to reach audiences and to make money from it.