The cells of the transplanted organ set off an immunological attack. Killer t cells and antibodies rush to the site, causing organ rejection, and the organ dies.

被移植器官的细胞将发动一场免疫攻势，杀伤T细胞和抗体就会冲到现场，引起排斥反应，而且这个被移植的器官就会死亡。

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If this protein is derived from harmless substances inside the cell, immune system components known as killer t cells will bypass the cell, considering it to pose no threat to the body.

如果该蛋白质来自于细胞中无害的物质，免疫系统中一种被称为T细胞杀手会认为它们对人体不构成威胁而将其放行。

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Natural killer cells, which are a class of lymphocyte distinct from t cells and B cells, destroy foreign cells (eg, neoplastic cells) even without prior sensitization.

自然杀伤细胞是一类与T细胞和B细胞不同的淋巴细胞，可在未被致敏的情况下破坏外来细胞(如肿瘤细胞)。

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So, the classes of T-cells: macrophages, natural killer cells, these are a class of cells that's particularly important called dendritic cells.

这类T淋巴细胞包括巨噬细胞,自然杀伤细胞等 统称为树突细胞,树突细胞尤为重要

耶鲁公开课 - 生物医学工程探索课程节选

Ultimately, researchers will likely want to combine it with one of the vaccines being developed to stimulate production of killer T cells.

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In addition, other types of cancer can interfere with the activation of "killer T cells" - immune cells which arrive to destroy tumour cells.

BBC: NEWS | Health | Immune boost 'widens cancer fight'

Not only did it increase production of a chemical which attracts "killer T cells" to the tumour site, it also switched these cells into an active state once they arrived.

BBC: NEWS | Health | Immune boost 'widens cancer fight'