久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

“元古代”的拼音為：yuán gǔ dài...

成礦時(shí)代為中元古代早期.The mineralization epoch is the early period of mesoproterozoic Era.王家崴子金礦床賦存于遼南古元古代淺變質(zhì)巖系中.Wangjiawaizi gold deposit occurs in Lower Proterozoic opimetamorphic rock series.元古代光球疑源類Valerialophostriata ( Jank. ...

“元古代”的英語可以翻譯為：[地] Proterozoic era ...