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.
We would have had to resort to the 
Kingdom of Science's special move
كنّا لنلجأ إلى سلاح مملكة العلم الخاص
hätten wir eh zum Spezialtrick
des Wissenschafts-Königreichs,
así que había que recurrir
a lo conocido,
así que había que tirar de lo conocido,
On doit se servir de notre spécialité,
quindi in ogni caso 
avremmo dovuto usare la mossa speciale
Vamos ter que depender da técnica 
especial do Reino da Ciência:
Как бы то ни было, главный приём
Царства науки — это метод проб и ошибок.