始新世中期，古海蛇类中终于出现了一种巨型成员-----古蛇（Pterosphenus），这种蛇的体型是现代大型蛇类的好几倍，长达9左右，它们的髓腔扩张，椎壁变薄，非常适应海洋生活，是当时海中叱咤风云的恶霸之一...
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他捉住那龙，就是古蛇，又叫魔鬼，也叫撒但，把他捆绑一千年。
And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years.
碧口群黄铁矿型铜金矿床产于前震旦纪古蛇绿岩套中。矿体受一定层位控制，分段集中，成群分布；
The pyrite type Cu-Au-deposit is located in the ophiolite suite of the Precambrian Bikou Group.
最近发现的蛇绿岩指示中、越交界区发育一条古特提斯的地缝合线，。
Recent discoveries on ophiolites indicate that there must have been a Paleotethyan geosuture zone bordering China and Vietnam.
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