Some of those differences in cells are obvious if you look at the cells in an adult organism.
你留心观察某个成年的生物,就会发现某些细胞分化极其明显
You already have an adult organism and you'd like to get the gene transferred.
你现在面对的是一个成年人,你想把基因导入他体内
Adult stem cells are acquired in some fashion from an adult organism.
成人干细胞是用某些方式,从成人体内提取的
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