sorry that i am medical student in petersburg...for me its hard to explain you in chinese...
1 Phagocytes are the white blood cells, Phagocytes of humans and other animals are called "professional" or "non-professional" depending on how effective they are at phagocytosis,professional phagocytes have molecules called receptors on their surfaces so they have识别特定抗原的能力,neutrophils, monocytes, macrophages, dendritic cells, and mast cells are professional phagocytes ....in this case of course the nonprofessional phagocytes can not具有识别特定抗原的能力.
2 B细胞受抗原刺激后能增殖分化: plasma B cells(produce antibodies) and memory B cells
没有 B细胞受抗原刺激后增殖分化为浆细胞和记忆B细胞