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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Three independent backends with different strengths

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I've rounded up the top three TV deals I could find heading into the weekend, with savings up to $1,100. Make note that while only one specific size of each TV is highlighted, most other sizes of each model are also discounted. Just click through to the different sizes on the product pages for more details.

Q：在阿里整个硬件战略中，销量或者退货率等指标，不是决策中最优先考量？

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