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

他使用了硝化纤维素， 一种易燃固体，通过将棉花与硝酸混坚硬、闪亮的色球体。

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.

本世纪中叶，美国企业家发现将硝化纤维素浸入蜡中会使其为一种坚硬耐用的物质，并将其申请了赛璐珞专利。