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英和辞典・和英辞典
This is a quiz. It has turned out that a plane that has just taken off had a bomb placed on it by somebody. The plane is flying 10,000 meters high now. We know that the bomb will explode when the plane descends and reaches 4,000 meters above sea level. How on earth could we save the plane and people on it? Have you hit on some idea? 
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