Ballistite was a smokeless propellant that combined nitrocellulose and nitroglycerine.

弹道石是一种无烟推进剂，结合了化纤维素和化甘油。

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，企业家发现化纤维素浸入蜡中会使成为一种坚硬耐用的物质，并申请了赛璐珞专利。

But could the men have picked up nitrocellulose on the train?

那么，这些人是否可能在火车上接触到了化纤维呢？

And when you expose cellulose, like in wood pulp or cotton, to nitric acid, it forms cellulose nitrate -- which is highly flammable.

当酸暴露在纤维素上， 比如木浆或棉花中，它会形成化纤维素——这是一种极易燃烧的物质。

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

他使用了化纤维素， 一种易燃固体，通过棉花与酸混合制成坚硬、闪亮的白色球体。

It proved that you've been handling something called nitrocellulose, which, yes, that is found in explosives, but it's also found in a number of other things, including playing cards.

这证明接触过一种叫化纤维的东西，没错， 它在炸药中存在，但也存在于他多种物品中，比如扑克牌。

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， 但制造过程很危险，因为化纤维素会在微风中爆炸。