—— 请按键盘 空白键 开始游戏 ——

We kid ourselves if we think that the ratio of procedure to data in an active data-base system can be made arbitrarily small or even kept small.
学习的意愿是一种内在动机,其来源和奖励都在于其自身的实践。
The past is never dead. It's not even past.
我们今天在林业上的每一个决定都会在未来几代人中产生影响。