The initiation of DNA replication in mammalian cells is a highly coordinated process that ensures duplication of the genome only once per cell division cycle.

哺乳动物细胞的DNA复制启动是一个高度协调的过程，从而保证了每次细胞分裂中基因组只复制一次。

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Wilmut said there were so many failures because it was difficult to ensure that the empty oocyst and the donor cell were at the same stage of the cell division cycle.

威尔·马特说之所以有这么多的试验失败，是因为很难保证空卵囊和供体细胞能处在细胞分裂周期的同一阶段。

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Cell Cycle Progression through the cell division cycle and transitions between various phases are regulated by using CDC25 phosphatases to activate specific cyclin-dependent kinase(CDK) complexes.

细胞分裂周期运行和不同时相的转换通过CDC25磷酸酶去磷酸化和激活周期蛋白依赖性激酶（CDK）复合物来调控。

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And while it's natural to see discord between the different elements after the kind of revolution Egypt has experienced, Elgindy said, he sees danger in the growing cycle of division.

CNN: Row over Egypt's new constitution reflects wider tensions

Until the cycle picks up again, this division, and so Philips as a whole, is likely to struggle.

ECONOMIST: Philips��s new frontiersman