系统有子系统，子系统有子系统，等等，这是无限的，这就是为什么我们总是从头开始。

Life is full of uncertainties, and that is what makes it interesting.

The beauty of cinema lies in its ability to make us feel less alone.

The ability to generalize from limited data is a hallmark of effective learning algorithms.

Sustainability isn't an option anymore; it's a necessity for any responsible mining company.