创新不仅仅是技术，而是改变我们的思维和运营方式。

有些书最好的部份仅止于封面与书背。

The world is not dialectical—it is sworn to extremes, not to equilibrium, sworn to radical antagonism, not to reconciliation or synthesis.

In machine learning, the trade-off between bias and variance is crucial for achieving good generalization.