Together with the IOC, we have co-constructed this very first Youth Olympic Games in these short and eventful two and a half years.

在短短的两年半里，我们与国际奥委会一起筹备了第一届青年奥林匹克运动会。

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When someone thinks of a window, a threshold, a hallway or a set of stairs like it was the first time, we can be sure that a bridge between thought and matter has been constructed.

像这样考虑窗户、门槛、走廊或一组楼梯的设计这是第一次，我们能肯定思想和物质之间可以建立桥梁。

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In the paper, we first analyzed the feedback relationship of the model, constructed system flow diagram, and proved validation of the model.

在文中，首先分析了模型中的主反馈关系，构建系统的物质流图和成本结构流图，并证明了模型的有效性。

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