gun graphite

例句：

1. 1. The gungraphite was used in ancient warfare to create smoke and confusion.
   古代战争使用火药石墨来制造烟雾和混乱。
2. 2. The black powder was a crucial ingredient in the development of firearms.
   黑火药是火器发展的关键成分。
3. 3.The graphite is used as a lubricant for metal cutting tools.
   石墨用作金属切割工具的润滑剂。