macronucleus造句

• A unicellular protoctist of the phylum ciliophora , whose members are usually covered in short undulipodia ( cilia ) and have two different kinds of nuclei , micronuclei and macronuclei
  2纤毛虫：纤毛虫纲的一类原生单细胞生物。该类生物具有短的纤毛，还具有两个细胞核，一个是大核，另一个是小核。