光线不断变化，每分钟都在改变事物的氛围和美感。

We suffer from an incurable disease called hope.

我不认为建筑是为了解决问题，而是为了创造机会。

The more I see of the moneyed classes, the more I understand the guillotine.

The PAC learning framework provides a formal way to quantify the learnability of a concept class.

A philosophical problem has the form: "I don't know my way about."

生活是荒谬的。