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。

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The character of tumor cell which is different from normal cell rests with its continuous self replication and obstinate anti-differentiation and apoptosis.

肿瘤细胞不同于正常细胞的特征在于其不断的自我复制、顽固的逆分化和凋亡。

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Embryonic stem cells (ES cells) are unique cell populations with the ability of self-renewal, unlimited proliferation, multipotent differentiation and maintaining their undifferentiated state.

胚胎干细胞(ES细胞)具有自我更新、无限增殖、保持未分化状态和向所有三个胚层分化的潜能。

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