1. Of or relating to the oldest known rocks, those of the Precambrian era, that are predominantly igneous in composition.
太古代的所知的最古的前寒武纪时代岩石，其组成成分主要为火成岩的，或与之相关的
-- 来源 -- 英汉 - 短句参考
2. (geology) formed in the later of two divisions of the Precambrian era.
（地质学）在前寒武纪后半部分形成的。
-- 来源 -- 汉英 - 翻译参考
3. Precambrian geology
前寒武纪地质学
-- 来源 -- 英汉 - 短句参考
4. Of, belonging to, or designating the earlier of two divisions of the Precambrian era.
早期前寒武纪（的）前寒武纪的两期中较早的一期的，属于它的或以其命名的
-- 来源 -- 英汉 - 短句参考
5. Precambrian flora
前寒武纪植物
-- 来源 -- 英汉 - 短句参考
6. (geology) formed in the earlier of two divisions of the Precambrian era.
（地质学）在前寒武纪中的前半部分中形成的。
-- 来源 -- 汉英 - 翻译参考
7. Precambrian time accounts for as much as eighty-five percent of all geological time.
前寒武纪占据了整个地质年代的百分之85。
-- 来源 -- 英汉 - 翻译样例 - 工程
8. The Precambrian Era.
前寒武纪时代
-- 来源 -- 英汉 - 短句参考
9. Usually the archeozoic and Proterozoic eras are grouped together and referred to as Precambrian in age. Precambrian rocks have been intensely deformed, metamorphosed and intruded, and are relatively barren of fossils.
10. The second great era after the Precambrian is called Mesozoic Era which extends from 230 million to 65 million years ago. It is the age of dinosaurs.
