跨行业合作是解决我们在粮食安全方面面临的全球挑战的关键。

The future of coal depends on our ability to innovate and reduce its environmental impact.

Every challenge is an opportunity to learn and improve.

我喜欢夜晚。没有黑暗，我们永远看不到星星。

The history of all hitherto existing society is the history of class struggles.

The unexamined life is not worth living.

每个人都有值得讲述的故事，每个故事都有值得学习的教训。