音标：['blæk led] ；

石墨, 笔铅
[化] 石墨

Plumbago; graphite. It leaves a blackish mark somewhat
like lead. See Graphite.

词型变化：名词复数形式 : black leads

black lead的用法和样例：

例句

用作名词(n.)

Graphite is a soft black substance.石墨是一种软而黑的物质。

【近义词】

graphite石墨
plumbago石墨粉(炭精)...

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学英语单词

8 bits

abatic

absisted

acousto-optically tuned laser