Celluloid gets its ignitable properties from a substance called nitrocellulose, which was used as a replacement for gunpowder in weapons during the 1800s.

赛璐珞从一种叫做硝的物质中获得可燃特性，硝 19 纪被用作武器中火药的代品。

He used nitrocellulose, a flammable solid, created by mixing cotton with nitric acid to create a hard, shiny, white sphere.

他使用了硝， 一种易燃固体，通过将棉花与硝酸混合制成坚硬、闪亮的白色球体。

By the middle of the century, American entrepreneurs discovered that dipping nitrocellulose in wax turned it into a hard, enduring substance, and patented it as celluloid.

到本纪中叶，美国企业家发现将硝浸入蜡中会使其成为一种坚硬耐用的物质，并将其申请了赛璐珞专利。