数学的快乐来自创造的行为，而不仅仅是结果。

政治秩序不仅仅是关于国家，还关于法治和问责制。

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.

企业的成功，不是偶然的，而是必然的。

Stay true to yourself and never let success change who you are.

估计问题的性质不同。在这里，我们不关心检验特定的假设，而是关心估计参数的值。

生命短暂，让它变得甜蜜取决于你。