1. 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.
   威爾馬特說之任何有怎么多的試驗報告出錯，是所以不好做到空卵囊和供體癌上皮細胞能處于癌上皮細胞分裂主義定期的同過程。