MHC restriction

例句：

1. 1. The study focused on the role of MHC in immune responses.
   该研究关注了MHC在免疫反应中的作用。
2. 2.The researcher found that MHC genes play a crucial role in disease susceptibility.
   研究者发现，MHC基因在疾病易感性中起着关键作用。
3. 3.The MHC system is responsible for identifying and presenting antigens to the immune system.
   MHC系统负责识别和呈现抗原给免疫系统。