地球的周长约为三十万斯塔迪亚。

Profit is important, but it should never come at the expense of our principles.

一个社会的真正考验在于它如何对待最脆弱的成员。

写作是一种爱的行为，一种接近他人、理解他人的方式。

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.