secondary atmospheric component
... 次生弧 secondary arc 次生大气 secondary atmosphere 次生大气部分 secondary atmospheric component ...
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这次生物大灭绝事件的发生似乎至少部分是因为大量的火山喷发，火山喷发将大量的二氧化碳喷到大气中。
At least part of the cause of this extinction seems to have been huge volcanic eruptions that poured carbon dioxide into the atmosphere.
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