killer cells

例句：

1. 1.The immune system is made up of many different types of cells, including killer cells that can destroy foreign invaders.
   免疫系统由许多不同类型的细胞组成，其中包括可以消灭外来入侵者的杀手细胞。
2. 2. Cancer cells are known to be more aggressive than normal cells, and they often contain killer cells that can kill other cancercells.
   癌细胞通常比正常细胞更具侵略性，它们常常含有可以杀死其他癌细胞的杀手细胞。
3. 3. Researchers have been studying killer cells for years in hopes of developing new treatments for cancer.
   研究人员多年来一直在研究杀手细胞，希望开发新的癌症治疗方法。