现在，如果胰岛素这把“钥匙”无法打开细胞让葡萄糖进入，一定是有东西干扰。
Now, if the insulin "key" cannot open up the cell to glucose, there is something interfering with it.
人类的卵细胞可以阅读父亲的基因钥匙并且筛除失败，这一发现可能会节省那些不孕不育夫妇数年的毫无成果的治疗。
Infertile couples may be spared years of fruitless treatment with the discovery that the human egg can read the father's genetic key and screen out failures.
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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