To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.

The future of liberal democracy depends on its ability to reform itself and address the legitimate grievances of those who feel left behind by globalization and technological change.

我已经履行了我的职责。我证明了庞加莱猜想，我在数学上没有什么可做的了。

Happiness is not something ready made. It comes from your own actions.

粮食安全是一个需要地方行动的全球性问题。

To say goodbye is to die a little.

顾客的信任难获得易失去；永远不要视为理所当然。

幸福就像一只蝴蝶：你越是想抓住它，它就越飞走。但如果你停止追逐，它可能会落在你身上。