迪尔克·冯·洛杰海因 Dirk Fon Rosenhayn
更重要的是，直到约翰海因里希冯屠能的离体国家在1826年，经济学家没有制订明确的和抽象的行为模式，以应用数学工具。
More importantly, until Johann Heinrich von Thünen's The Isolated State in 1826, economists did not develop explicit and abstract models for behavior in order to apply the tools of mathematics.
“理性主义者的理智不足以告诉他们有意识的理性力量是有一些缺陷的”(弗雷德里希·奥古斯特·冯·海因克)。
"The rationalist whose reason is not sufficient to teach him those limitations of the powers of conscious reason" (Friedrich August von Hayek).
世界第一架喷气式飞机在德国北部的马里奈赫作第一次飞行。飞机引擎为冯·奥海因博士所设计。
The world's first jet-propelled aeroplane, with engine designed by Dr Von Ohain, made its first flight, at Marienehe in North Germany.
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