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充满无限奥秘的深邃苍穹,对人类的诱惑力实在太大了。千百年来,人类一直都幻想能冲破天空的封锁,憧憬着能像飞鸟一样自由的飞翔。各个国家也为此而相继出现过一些以鸟羽为翼的"飞人",但他们的试验皆以失败而告终。仅管如此,却阻挡不了人类征服天空的雄心。随着历史的进步,知识的积累,生产力的提高,人类终于把飞上天空的幻想变成了现实。