前寒武纪-寒武纪界线 Precambrian-Cambrian boundary
理查德·道金斯：大卫，我知道你正在做一个关于寒武纪和前寒武纪化石的专题节目。
RD: I know you're working on a programme about Cambrian and pre-Cambrian fossils, David.
概述了中国在晚前寒武纪——寒武纪生物化石群研究多方面（尤其是大化石）的主要成就。
The many achievements in the study on. the fossils (in especial megafossils) of late Precambrian - Cambrian in China are outlined.
因而前寒武纪化石的缺失和寒武纪三叶虫等突发式出现，好象一把双刃剑，对达尔文演化学说的塔基构成了威胁。
Therefore the deficiency of pre-Cambrian fossil and the sudden emergence of Cambrian trilobite are like a double edged sword posing threat for the very foundation of Darwin evolutionism.
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