powdered graphite

例句：

1. 1. The engineer used a powdered graphite to make the machine run more smoothly.
   工程师使用粉末石墨使机器运行得更平滑。
2. 2. The graphite powder was used as a lubricant in the machine's moving parts.
   石墨粉被用作机器移动部件的润滑剂。
3. 3.The graphite powder was mixed with water to create a paste that could be applied to the surface of the paper.
   将石墨粉与水混合制成糊状物，可以涂抹在纸张表面。