immunoglobulins

例句：

1. 1.These antibodies help the body fight off infections.
   这些抗体帮助身体抵抗感染。
2. 2. The study found that some people have higher levels of these proteins than others.
   研究发现，有些人的这些蛋白质水平比其他人多。
3. 3. Immunoglobulins play a crucial role in the immune system.
   免疫球蛋白在免疫系统中起着至关重要的作用。