第五天英文:The Fifth Day。例句:第五天仅CK血清含量A组低于B组病人。The fifth day after the operation only CK serum content of group A less than group B patients.感染病毒颗粒的第五天左右可以观察到人ES细胞变得分散、细长,似神经前体细胞形态。We observed that human ES cells became scattered and thin and exhibited neural progenitor cell-like morphology on day 5 after virus transduction.