译文：人生变化不定，富贵难以预料。

Quality should never be compromised for short-term gains.

I want the work to ask questions, not provide answers.

创新是可持续发展的关键。

The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.

The future of agriculture lies in sustainable practices that balance productivity with environmental stewardship.

当人们说话时，要完全倾听。大多数人从不倾听。