我喜欢玩转书籍的物理特性——翻页、洞洞、不同尺寸。
Our descendants will achieve things that will amaze us， yet a portion of what they will create could have been made with today’s materials and tools if we had had the imagination. Think bigger.
最优财政政策的设计应旨在减轻时间不一致性和政治经济周期引起的扭曲。