HeLa cells

例句：

1. 1. HeLa cellsare widely used in cancer research.
   人癌细胞在癌症研究中被广泛使用。
2. 2. The studyof HeLa cells has led to significantadvancements in cancer treatment.
   研究人癌细胞已经导致癌症治疗的重大进步。
3. 3. HeLacells have been successfully cloned and studiedfor decades.
   人癌细胞已经被成功地克隆并研究了几十年。