内皮尔教授的理论认为，当地球进入一颗大彗星脱落的密集的尾状碎片带时，那次灾难性的毁灭就发生了。
Professor Napier's theory suggests the devastation took place when the Earth strayed into a dense trail of fragments shed by a large comet.
肝星状细胞、成纤维细胞和窦状隙内皮细胞是肝内ctgf的重要来源。
It can be concluded that CTGF was mainly produced in hepatic stellate cells, sinusoidal endothelial cells and fibroblasts.
海绵状血管畸形由窦状扩张的血窦组成，窦壁由内皮细胞，基膜物质和周细胞组成。
There were endothelial cells , basal membrane like materials and pericytes in the walls of these blood sinus.
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