赚钱的唯一方法是不亏钱。
The only way to make money is to not lose it.
The core of the energy revolution is cleanliness and efficiency, and the coal industry must actively adapt to this trend.
好的市场设计能让个人激励与社会效率保持一致。
Understanding the real lives of the poor is the first step toward designing effective policies to help them.
If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much.