procentriole

例句：

1. 1. The process of cell division is known as mitosis.
   细胞分裂的过程被称为有丝分裂。
2. 2. Procentrioles are found in the nucleus of eukaryotic cells.
   原核细胞的核中存在极核。
3. 3. In some species, procentrioles are used to measure the length of chromosomes.
   在一些物种中，极核被用来测量染色体的长度。