Some T cells (T8 cells) are cytotoxic or killer cells; they act directly on cells bearing antigen (tumor cells and tissue transplanted from an organ donor).

一些T细胞（T 细胞）是细胞毒性或杀伤细胞;它们直接作用于携带抗原的细胞（肿瘤细胞和从器官供体移植的组织）。