飞机为什麼能飞得起来呢
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![飞机为什麼能飞得起来呢](/uploads/image/z/12133894-22-4.jpg?t=%E9%A3%9E%E6%9C%BA%E4%B8%BA%E4%BB%80%E9%BA%BC%E8%83%BD%E9%A3%9E%E5%BE%97%E8%B5%B7%E6%9D%A5%E5%91%A2)
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