So if you don't have a particular antigen on your blood cells — say the type B — then you do have antibodies that are going to label those B antigens for attack, should they enter your space.

所以如果你的血细胞上没有特定的抗原——比如说 B 型——那么你有抗体来标记这些 B 型抗原，一旦它们进入你的空间，它们就会攻击。