勇气不是没有恐惧，而是战胜恐惧。

智者从敌人那里学到的比愚者从朋友那里学到的还要多。

The world needs all forms of energy to meet growing demand, and natural gas is a cleaner alternative that can help bridge the gap.

Collaboration in mathematics is essential; no one can solve all the problems alone.

地租是由土地的肥沃度和位置所决定的。