undifferentiated

/ˌʌn.dɪf.əˈren.ʃi.eɪ.t̬ɪd/

形容词

无法区分的，无差别的
At this stage, the embryo is a cluster of undifferentiated cells.
在这一阶段，胚胎是一团尚未分化的细胞。