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

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。

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But even among tracheal allografts that had been cryopreserved for 7 months, ciliary cells were present, and immunohistochemical staining for MHC-II was positive.

但是，在冷冻保存7个月的气管移植物上，仍确认有纤毛上皮的存在。

youdao

But even among tracheal allografts that had been cryopreserved for 7 months, ciliary cells were present, and immunohistochemical staining for MHC-II was positive.

但是，在冷冻保存7个月的气管移植物上，仍确认有纤毛上皮的存在。

youdao