The beauty of instrumental variables is that they allow us to see the world in a new light.

我宁愿让人困惑，也不愿让人无聊。

The steel industry is tough, but resilience is what separates the best from the rest.

首要且最伟大的胜利是战胜自己。

要了解程序，您必须同时成为机器和程序。

过去不是阴影，而是鲜活的在场。