and antibodies are made by a subset of cells called B-cells.

抗体是由一类称为B细胞的细胞亚族产生
The other part of the adaptive immune system is

获得性免疫系统还包括
the cell mediated immune system

细胞免疫
and this is an immune where that doesn't involve antibodies

这一免疫反应不包含抗体
but involves cells that are activated in response to

但包含可以被激活来应答
a foreign antigen and that utilize cellular means to get rid of it.

并清除外源抗原的免疫细胞
Usually the cellular means that

通常细胞免疫意味着
they get rid of is that instead of an antibody being produced,

不用生成抗体就能清除抗原
you activate a population of cells that

你激活了一个细胞类群
will specifically go

这一类群能够[特异性地分化]
and hunt down the foreign antigen,

并杀伤外源抗原
or more commonly,

或者更常见的是