二倍体细胞培养（ｄｉｐｌｏｉｄｃｅｌｌｃｕｌｔｕｒｅｓ）／：通常用胚龄较小的肺组织，经过与原代细胞相同的处理和培养后，长成单一类型的成纤维母细胞．此细胞在体外可传５０～７０代，以后逐渐老化。在传代过程中，其染色体的数目始终保持正常（即２Ｎ或双倍体）。... Diploid cell cultures /: Lung tissue, usually of smaller embryonic age, grows into a single type of fibroblast after the same treatment and incubation as the primary cells. This cell can be transmitted in vitro 50 to 70 generations, then gradually aging. During passage, the number of its chromosomes remains normal (ie 2N or diploid). ...