Natural experiments can provide valuable insights into economic questions.
自然实验可以为经济问题提供有价值的见解。
The coal industry has a critical role to play in providing affordable and reliable energy while we transition to a lower-carbon future.
The best investment strategy is one that is simple, low-cost, and broadly diversified.
我不后悔任何事情,因为每一步都让我走到了这里。
好奇心是发现的引擎。