求翻译：久而久之，早期的地壳便形成了。铁、镍等重元素汇集起来，形成了地核；氧、硅、铝等稍轻一点的元素则留在地表，组成了地壳。地球上剧烈的火山活动释放出较轻的气体，形成有别于今日的早期大气。当大气凝结，水蒸气便汇聚成云；雨水造就湖泊、河流和海洋。同时，地壳破裂，逐渐形成大陆。大陆、海洋和缺氧的大气使得分子结构越来越复杂。是什么意思？

Over time, the early crust formation. Heavy elements such as iron, nickel pooled to form the Earth's core; oxygen, silicon, aluminum, slightly lighter elements remain in the surface to form a crust. Intense volcanic activity in the Earth release of lighter gas to form different from today's early at

Over time, in the early days of the earth's crust is formed. Iron, nickel, and other heavy elements come together, to form a core; oxygen, silicon, aluminum, a lighter elements are left on the surface, forming a crust. The intense volcanic activity on Earth release out of the gas light, which is dif

Gradually, the early earth's crust then formed.The iron, the nickel equipollent element collect, has formed the core; The oxygen, the silicon, the aluminum and so on are slightly light a element to keep the surface, has composed the earth's crust.On the Earth the fierce volcanic activity releases th

Over time, the early crust has formed. Iron, nickel and other heavy elements together, forming a core; oxygen, slightly lighter elements such as Silicon, aluminum is to remain at the surface to form crust. Intense volcanic activity on the planet released a lighter gas, formation, unlike today's earl

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