学到的不是动作，而是意义。

If we don’t act now, the next generation will inherit a world with fewer resources and greater challenges.

我器重那个见到我做事，不见到我也做事的人。 

The city is the most important thing. Buildings are just fragments of the city.

投资新技术不是可选的，而是能源未来的必要条件。