The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself.

我不害怕失败，我害怕不去尝试。

智者寻求真理，愚人追求娱乐。

Sustainability isn't an option - it's our responsibility to future generations.

如果你看得足够久，平凡就会变得非凡。

可持续发展不仅仅是一个流行词，而是我们对后代的责任。