有些人特别善于了解自己的知识极限，因为他们必须这样做。
The world is a book, and those who do not travel read only one page.
Sustainability is not just about planting trees; it's about planting ideas that grow into actions.
预测未来的最好方法就是创造未来。
We live in a world of shadows, and what we call reality is only the shadow of a shadow.
Every story has a beginning, a middle, and an end, but not necessarily in that order.