1、A hapten is a molecule that can elicit an immune response only when it is bound to a larger carrier molecule.
一个半抗原只有当它与一个更大的载体分子结合时才能引发免疫反应。

2、The hapten attaches to proteins in the body, triggering an allergic reaction.
半抗原附着在体内的蛋白质上，引发过敏反应。