complement system
noun [ S ] medical specialized uk/ˈkɒm.plɪ.mənt ˌsɪs.təm/ us/ˈkɑːm.plə.mənt ˌsɪs.təm/
补体系统
a group of proteins that works with other substances as part of the immune system
The complement system plays an important role in human immunological defences against cancer, bacteria, and viruses. 补体系统在人体对癌症、细菌和病毒的免疫防御中有重要作用。