hemacytoblast

例句：

1. 1. Hemacytoblasts are the earliest stage of bloodcell development.
   血细胞前体是血细胞发育的最早阶段。
2. 2. Thestudy of hemacytoblasts has important implications forunderstanding human health.
   研究血细胞前体对人类健康具有重要意义。
3. 3. During the fetalperiod, hemacytoblasts differentiateinto various types of blood cells.
   在胎儿时期，血细胞前体会分化成各种类型的血细胞。