They might ingest extracellular antigen, presented pieces of it on their cell surface in the context of MHC-2.

它们可以吞噬胞外抗原,根据细胞表面的,主要组织相容性抗原-2

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These cells can now kill cells that have the correct signature, and the signature is MHC-1 with this foreign antigen associated with it.

而这些细胞现在可以杀伤带标记的细胞,这些标记就是MHC-1表面受体,和与其相联的异己抗原

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Because it has MHC-1, your MHC-1 on it, this T-cell recognizes that it's one of your cells but it has a foreign antigen associated with it.

因为该细胞上有MHC-1,T细胞将这些细胞识别为自身细胞,但这些细胞带有异己抗原

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An antigen expressed in the context of MHC stimulates your immune system.

同MHC共同表达的抗原,激活了免疫系统

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