真正的艺术来自于内心的真诚。
The less secure a man is, the more likely he is to have extreme prejudice.
史记
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。
"Silence between words often speaks louder than the words themselves."
I'm not afraid to fail, I'm afraid not to try.
In politics, nothing happens by accident. If it happens, you can bet it was planned that way.