免疫血清

例句：

1. 1.The immune system is responsible for protecting the body against foreign invaders.
   免疫系统负责保护身体免受外来入侵者的伤害。
2. 2. The study of immunoglobulins has led to new treatments for cancer.
   研究免疫球蛋白已经导致了新的癌症治疗方法的出现。
3. 3. The patient's blood tests showed high levels of immunoglobulin G antibodies.
   患者的血液测试显示高水平的免疫球蛋白G抗体。