晚震旦世—早寒武世
late sinian-early cambrian
新元古代-早寒武世
neoproterozoic-early cambrian
早寒武世黑色岩系
Lower Cambrian black shale series
中寒武世-早奥陶世
middle cambrian-early ordovician
寒武纪—早奥陶世
Cambrian-Palaeo-ordovician
早、中寒武世
Early and Middle Cambrian
宫内早早孕
Very early intrauterine pregnancy
宫外早早孕
Very early ectopic pregnancy