Senku and the kingdom are going to need rations to be well during their attack on Tsukasa’s empire. There’s a science for that.
We're literally freezing 
it and then drying it.
.سنجمّده حرفيًّا ثمّ سنجففه
Das Wort ist hier Programm.
Pues "freeze and dry".
Freeze and dry.
On gèle, puis on déshydrate.
Detta anche crioessiccazione e come
 dice il nome, prima si ghiaccia, poi si secca.
É literalmente congelar e secar.
Заморозка и сушка.