translation.en: Here you had a chemical, either from the natural world or artificially synthesized in the laboratory, and it would course through your body, it would find its target, lock into its target -- a microbe or some part of a microbe -- and then turn off a lock and a key with exquisite deftness, exquisite specificity.
translation.zh: 你拿到的化学制剂， 不管是从自然提取的 还是从实验室人工合成的， 服用之后它会遍布至你的全身 找到它的目标 然后锁定目标—— 一种微生物或者它的一部分—— 通过非常精巧和特别的手段 关闭目标的某一个功能。