The sun is our most powerful tool in Africa. We must learn to work with it, not against it.

Laughing is the best form of therapy.

思想的多样性带来更好的决策和更创新的解决方案。

最好的故事是那些在我们读完很久之后仍萦绕在心头的故事。

Sustainable development is not a choice, but a responsibility.

Nature is written in mathematical language.

释义：国际秩序的本质是武力威慑下的平衡。