Arknights: The Life Inside - Chapter 13

... ned his mouth, then shut it. How could he even begin to explain? Gunpowder wasn't just one thing—it was a compound, a reaction, a cornerstone of an entire branch of warfare. The structure of modern bullets alone involved nitrocellulose, carefully designed aerodynamics, metallurgy, and precision chemistry.

But how could he explain all that to someone who had never even heard of it?

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After a moment of thinking, he ...