下一次绿色革命必须是高产且对环境负责的。
The sun is our most powerful tool in Africa. We must learn to work with it, not against it.
在研究自然时,想象力必须受到逻辑和实验的严格规则指导。
Fear is the biggest disability of all. And will paralyze you more than being in a wheelchair.
It is error only, and not truth, that shrinks from inquiry.