Tsukasa has learned about the cave where the nitric acid is collected. The race is on between Senku and Tsukasa to restore humanity in their respective visions.
The point is, if even one part of it 
gets nital on it and breaks down...
بيت القصيد هو أنّه إن سُكب النايتال
...على جزء واحد فقط منها وتحلّل
Doch wenn auch nur eine Stelle mit Nital
in Berührung gerät und bröckelt, …
In pratica,
O principal é que se uma parte 
tiver nital e se quebrar,
Фокус в том, что если ниталь
пробьёт хотя бы часть оболочки,