Ballistite was a smokeless propellant that combined nitrocellulose and nitroglycerine.

弹道石是一种无烟推进剂，结合了维素和甘油。

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

他使用了维素， 一种易燃固体，通将棉花酸混合制成坚硬、闪亮的白色球体。

It worked well once it was created, but the manufacturing process was dangerous because nitrated cellulose can explode in a warm breeze.

它一经创建就运作良好， 但制很危险，因为维素会在微风中爆炸。

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.

到本世纪中叶，美国企业家发现将维素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。