1·Although named after a site in Australia, the Ediacaran formation is worldwide in distribution and dates to Precambrian times.
尽管伊迪卡拉是以澳大利亚的一处地名而命名，但伊迪卡拉沉积层却遍及世界各地，并且可追溯到前寒武纪时代。
2·The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.
然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。
3·Precambrian animals must therefore have lived at such depths.
因此，前寒武纪的动物肯定曾经生活在这么深的地方。
4·This study supplies new geological data for research of the early Precambrian crust growth and tectonic evolution of Western Kunlun.
这对研究西昆仑山早前寒武纪陆壳增生及构造演化提供了重要的地质资料。
5·Precambrian rocks are described as "basement rocks" because they are usually buried deep under the surface.
前寒武纪岩石被称为基岩，因为它们通常深埋于地表之下。