痛苦+反省=进步
All things are possible until they are proved impossible and even the impossible may only be so, as of now.
To write is to resist the erasure of history.
估计问题的性质不同。在这里,我们不关心检验特定的假设,而是关心估计参数的值。
行为主义者放在自己面前的规则或衡量标准总是:我能否用"刺激和反应"来描述我所看到的这一行为?
You belong with me You belong with me?.
The first step toward getting somewhere is to decide that you are not going to stay where you are.