根 据NK细胞活化的“丧失自我”（missing self）识别模式，当NK 细胞表面的抑制型杀伤细胞免疫球蛋白受体（KIR）找不到 相应的HLA—I类配体时就会发生活化，杀伤靶细胞。
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人生最大的挑战之一就是，在一个丧失自我的世界中保持自我。
Stop trying to be someone you're not. – One of the greatest challenges in life is being yourself in a world that's trying to make you like everyone else.
仅仅因为我们不擅长做某件具体的事情，并不意味着我们需要丧失自我尊重。
Just because we are not very good at a particular task, doesn't mean we need to lose our self respect.
久而久之，孩子会丧失自我认同感，丧失他们本来具备的那种内在学习动力。
In the long run, they lose their sense of identity and intrinsic motivation for performing activities they once enjoyed.
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