淋巴细胞识别由主要组织相容性复合物（MHC）I或II类分子递呈的抗原肽片段。

T lymphocytes recognize antigenic peptide fragments presented by major histocompatibility complex(MHC) class I or class II molecules.

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研究人员的研究集中在检测主要组织相容性复合物（MHC）上，它能结合特定的抗原决定簇并且它是触发免疫系统攻击感染细胞的钥匙。

The researchers focused their testing on the Major Histocompatibility Complex (MHC), which binds to certain epitopes and is key to triggering the immune system to attack a virus-infected cell.

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