proliferative zone of cartilage cell

例句：

1. 1. The tumoris located in a proliferativezone of the liver.
   这个肿瘤位于肝脏的一个增殖区。
2. 2. The researchers found that theproliferative zone was responsible forthe growth of the tumor.
   研究人员发现，增殖区是肿瘤生长的原因。
3. 3. The proliferative zone is an important factorin the development of cancer.
   增殖区是癌症发展的一个重要因素。