Courage is grace under pressure.

I don't know what I would do if I didn't act. I think I would go mad.

The best way to learn is by doing—get your hands dirty in the lab.

The hunger angel is a metaphor for the hunger that stalks you like a shadow.

"The best literature challenges us to see the world differently."

获得自由的唯一途径就是保持诚实。

柴油发动机可以使用植物油作为燃料，这将极大地促进使用该技术的国家的农业发展。