Man has always wanted to fly．Some of the greatest men in history have thought about

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• Man has always wanted to fly．Some of the greatest men in history have thought about
• Man has always wanted to fly．Some of the greatest men in history have thought about
• 英语翻译Man has always wanted to fly．Some of the greatest men in history have thought about the problem．One of these,for example,was the great Italian artist,Leonardo da Vinci（达•芬奇）．In the sixteenth century he made designs for machines that would fly．But they were never built． Throughout history,other less famous men have wanted to fly．An example was a man in England 800years ago．He made a pair of wings from chicken feathers．Then he fixed them to his body
• 翻译Some of the men work in the
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