抗原特异性免疫记忆是免疫的基本特征，其物质基础是初次免疫应答后产生的抗原特异性的记忆性T淋巴细胞和记忆性B淋巴细胞以及浆细胞。

Antigen-specific immunological memory is a cardinal feature of immunity, which depends on generation and maintenance of memory t lymphocytes, B lymphocytes and plasma cells with antigen specificity.

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记忆B细胞被认为是记忆干细胞，通过抗原依赖和非抗原依赖的方式，能转化为浆细胞而产生抗体。

Memory B cells behave as 'memory stem cells' capable of generating plasma cells and antibodies in an antigen-dependent as well as in an antigen-independent fashion.

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So, these memory cells are a way that your immune system keeps track of antigens that it's been exposed to for even if maybe the plasma cells that were producing antibody in response to the initial exposure have died and disappeared.

所以,这些记忆细胞,是人体免疫系统记忆抗原的一种方法,即使由浆细胞产生的抗体,在初次免疫应答中全部被消灭,记忆细胞仍然能迅速分化为抗体分泌细胞

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