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探寻地球的起源:地球是如何诞生的?
地球的诞生离不开太阳系的形成。大约在46亿年前,太阳系的形成始于一个巨大的分子云。这些分子云主要由氢、氦及少量重元素组成,经过重力的作用,逐渐坍缩形成了一个旋转的盘状结构。
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今日热点
Tapped as energy secretary
Wins Miss Universe 2024
California to rename places
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Flash bombs target home
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Retires from NFL at 27
Biden meets with Xi
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Fritz reaches title match
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World Series winner dies
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Instruments up for auction
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98th World Cup win
Named WH press secretary
Overtime pay rule blocked
Opposes RFK Jr. nomination
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