The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.

I have always been alone, but I have never been lonely.

过去两个世纪最重要的政治发展是现代国家的崛起。

Sustainability isn't just a buzzword—it's our responsibility to future generations.

To write is to wrestle with silence.

A wealth of information creates a poverty of attention.

农业效率绝不能以牺牲环境管理为代价。