In high dosage, the treated group has less pathological change, and the average oocyst number is clearly higher than that of the control group.

较高剂量下，处理组病变略轻，而平均卵囊数明显高于未处理对照组。

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。