对任何模型的最大期望是它能提供一个对现实有用的近似。

越南人民深深热爱独立、自由与和平。但在面对美国的侵略时，他们团结一致奋起反抗。

有人问我什么是幸福，我回答说：不奢求非必需之物。

The true measure of a bank's success is not just its profits, but its positive impact on society.

You think your pain and your heartbreak are unprecedented in the history of the world, but then you read.

The key to nudge is to make it easy for people to make better choices.