He says their research has identified an "Achilles' heel" of the parasite - an enzyme that is needed for the parasite's survival.

VOA: standard.2010.04.05

But Achilles, of course, he got him in the heel where he didn't have any armor.

但阿喀琉斯,是脚踵中箭,他也是没有穿盔甲的

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