跨越国界和文化的合作是解决全球农业挑战的关键。

真正的艺术家宁愿让妻子挨饿、孩子赤脚、七十岁的老母为生计操劳，也不愿做艺术以外的工作。

Psychology must bridge the gap between theory and practical life.

Innovation in coal mining isn't about reinventing the wheel, but about making the wheel more efficient and environmentally friendly.

解释：往往在你觉得是轻而易举的时候，困难也就跟着来了。