The world changes when you change.
一个人,如果不是他们留下的痕迹,又是什么呢?
政策规则优于自由裁量,因为它们消除了时间不一致性问题。
The future of energy lies in the integration of traditional and renewable sources. We must adapt and lead this transition.
插画不应该只是装饰文本;它们应该扩展文本。