噪音使金融市场成为可能，但也使它们不完美。

The poet is a man who manages to be, in his own lifetime, what all men would like to be after their death.

The work on IVF was driven by the desire to help infertile couples.

千里之行，始于足下。

国际体系的无政府性质迫使各国将自身生存置于一切之上。