The spread of liberal democracy and the integration of the world economy have created a situation in which the only legitimate form of government is one that is based on popular sovereignty and respects basic human rights.

在量子材料的领域中，拓扑的概念提供了一个强大的透镜，通过它我们可以理解和预测新的物质相。

Never stop learning, because the world never stops changing.

我不害怕冒险。我认为这就是生活的意义。

沉默是快乐的最佳使者：如果我能说出多少，我就不会那么快乐。