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关注：1
2013-05-23 12:21
求翻译：Man always wanted to fly in the sky. They watched birds flying and wished they could fly too. Man made wings and tied them on their bodies to help them fly. But they failed again and again. Man knew how to make kites. They made different kinds of kites to help them fly. Kites could stay in the air for many hours. But u是什么意思？ 待解决
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- 离问题结束还有
Man always wanted to fly in the sky. They watched birds flying and wished they could fly too. Man made wings and tied them on their bodies to help them fly. But they failed again and again. Man knew how to make kites. They made different kinds of kites to help them fly. Kites could stay in the air for many hours. But u
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2013-05-23 12:21:38
人总是想在天空中飞翔。他们观看鸟类飞行，并希望他们能飞得。人造翅膀，绑在他们的机构，以帮助他们飞翔。但他们一次又一次的失败。人知道如何做风筝。他们提出各种不同的风筝，以帮助他们飞。风筝可以停留在空中几个小时。但不幸的，大多数的人与风筝飞到元气大伤。所以他们不得不停止试图飞翔的翅膀。在1783年，两名法国人尝试热气球。他们发现，热空气比冷空气轻。这就是为何热空气会向上（上升）。如果一个气球充满热空气，它会向上走。他们建立了一个气球。它是由薄布和纸。他们充满热空气进入空气。明年，一个巨大的热气球进行七人至900米的高度。后，在世%E
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2013-05-23 12:23:18
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2013-05-23 12:24:58
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2013-05-23 12:26:38
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2013-05-23 12:28:18
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