T cell

例句：

1. 1.The immune system relies on T cells to fight off infections.
   免疫系统依赖于T细胞来抵抗感染。
2. 2. T cells play a crucial role in the body's defense against viruses and bacteria.
   T细胞在身体对抗病毒和细菌的防御中起着关键作用。
3. 3.In some cancer treatments, T cells are used to target and destroy tumor cells.
   在某些癌症治疗中，T细胞被用来靶向并摧毁肿瘤细胞。