Which agglutinogens you have on your erythrocytes defines your blood type.

你红细胞上的凝集素决定了你的血型。

Your red blood cells have specialized antigens on them, called agglutinogens, that activate antibodies that work by binding invading cells to each other, which causes coagulation, or the clumping of blood.

你的红细胞上有专门的抗原，叫做凝集素原，它激活抗体，通过将入侵细胞相互结合来工作，从而导致凝血，或者血液结块。

In the most important blood classification — the kind people are most familiar with — there are only two kind of agglutinogens, simply A and B. And your blood can either have one, or both, or neither of these molecules.

在最重要的血液分类中，也就是人们最熟悉的种类中，凝集素只有两种，简单地说，A 和 B。你的血液中可以有一种，或者两种都有，或者两种分子都没有。