nitro colouring matters

例句：

1. 1. The scientist used nitro to create a new type of explosive.
   科学家使用硝酸创造了一种新型的爆炸物。
2. 2. Nitro is a powerful chemical that can be used in various industrial processes.
   硝酸是一种强大的化学物质，可以用于各种工业过程。
3. 3. Nitro is a coloring matter that gives food its characteristic red color.
   硝酸是一种着色物质，给食物带来了其特有的红色。