La liberté, c'est le droit de faire tout ce que les lois permettent.

The poet is a man who plants a tree and then sits in its shade.

绿色发展不是选择题，而是必答题，我们要坚定不移地走绿色低碳发展之路。

A good mathematician is always ready to generalize.

Attention is the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought.