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breosla iontaise
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environ.
化石燃料
包含有能量的物质,该物质是经过千万年的变化,从原始的动植物或有机物形式,通过在地下的掩埋形成。地壳内部进行的物理化学变化,使其变成煤、泥炭、石油或天然气。
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