pre-differentiation stage

例句：

1. 1. The researchersfound that the pre-differentiation stageis crucial for the development of stem cells.
   研究人员发现，预分化阶段对于干细胞的发展至关重要。
2. 2. During the pre-differentiation stage, the cells are still in a stateof fusion and cannot yet differentiate intospecific cell types.
   在预分化阶段，细胞仍处于融合状态，还不能分化成特定的细胞类型。
3. 3. The pre-differentiation stageis an important phase in the process ofembryonic development.
   预分化阶段是胚胎发育过程中的一个重要阶段。