While continuing to use the hot air balloon to search for the oil, it's decided that Ishigami Village needs to take up agriculture to prevent future food shortages, as well as to produce preserved food for their upcoming sea voyage.
And then, after continuous 
exposure to nitric acid...
...وعندها بعد تعرضه باستمرار لحمض النتريك
während die Salpetersäure
auf ihn getropft ist.
Le fue cayendo ácido nítrico y…
Le fue cayendo ácido nítrico y…
Et à force de recevoir
de l’acide nitrique…
Poi è stato bagnato ripetutamente 
con dell'acido nitrico e così...
E então, depois de ser 
exposto ao ácido nítrico...
И на него долго капала азотная кислота.