At last, though renewing medium and prolonging the time of culturing, the content of theanine in tea cell was increased to a higher level.
最后通过更新培养基、延长培养时间，使细胞茶氨酸含量得到较大的提高。
Stem cell is a class of self-renewing and trap a potential of cell groups, it can self-renewal in long-term and has the ability of differentiation to form variety cells in certain conditions.
干细胞是一类具有自我更新和多向分化潜能的细胞群体，它能长期地自我更新，在特定的条件下具有分化形成多种终末细胞的能力。
We show that endothelial cells interact closely with self-renewing brain tumor cells and secrete factors that maintain these cells in a stem cell-like state.
我们的研究表明内皮细胞与能够自我更新的脑肿瘤细胞之间存在密切的交互作用，并且能够分泌细胞因子来维持这些细胞的干细胞状态。
We show that endothelial cells interact closely with self-renewing brain tumor cells and secrete factors that maintain these cells in a stem cell-like state.
我们的研究表明内皮细胞与能够自我更新的脑肿瘤细胞之间存在密切的交互作用，并且能够分泌细胞因子来维持这些细胞的干细胞状态。
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