They were starting to run out of penicillin, so what they would do was run with his urine across the road to re-synthesize the penicillin from his urine and give it back to him, and that worked.
Ils commençaient à être à court de pénicilline, alors ils emportèrent son urine au labo pour re-synthétiser la pénicilline à partir de cette urine et la lui redonner, et ça a marché.