english: 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.
non_english: Imeli smo kemikalijo, naravno ali umetno sintetizirano v laboratoriju, in ta bi potovala po vašem telesu, našla svoj cilj se nanj pritrdila-- neki mikrob ali delec mikroba-- in potem bi zaklenila  ključavnico s ključem zelo spretno, zelo točno.