解释：人有知识，犹如树木有枝叶，树木有了枝叶，能带给人阴凉，人有了知识，就可以为人民做更多的事。

理论计算机科学的美在于它能够抽象并解决看似不可逾越的问题。

In computational learning theory, we seek to understand the fundamental principles that govern learning from data.

The challenges of today's coal industry require bold leadership and vision.

I've learned that you can't control everything, but you can control how you react to it.

The only way to improve is to challenge yourself against the best.