孔子说：“温习旧知识时，能有新收获，就可以做老师了。”

Don't be afraid to make mistakes. If you're not making mistakes, you're not trying hard enough.

只要你不放弃尝试，就永远不会失败。

The trade-off between bias and variance is a fundamental concept in machine learning.

未来的企业都将成为技术公司，云计算是这一转变的核心驱动力。