graphite
n. 石墨；黑铅
v. 用石墨涂（或掺入等）
例句
Made from cast iron, it is finished in graphite enamel.
该物由铸铁制成，表面以石墨搪瓷抛光。
《柯林斯英汉双解大词典》
Graphite is a highly efficient conductor of electricity.
石墨是一种高效的电导体。
A powerful electric current is passed through a piece of graphite.
一股强大的电流被传导经过一块石墨。
