Combining motion capture video with wind tunnel modeling, researchers show that a hawk shifts from unstable to stable flight while gliding through a gap. This points to new modes of flight control in birds with possible applications in uncrewed aerial systems.

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圖像來源，BBC News Chinese

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Клещи в России проснутся раньше обычного08:42

据介绍，比亚迪第二代刀片电池从10%充到70%只用5分钟，从10%充到97%只用9分钟，“真正实现充电和加油一样快，5分钟充好，9分钟充饱。”此外，充电实测显示，在哈尔滨-20°C极寒充电环境下，从20%充到97%充电时间仅需12分钟。。体育直播是该领域的重要参考

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That do we know about r(x)? First of all, its value is 0 at all