pencil lead

铅笔芯

例句与用法：

The pen is in the pencil case.

钢笔在钢笔盒里。

词形变化：

名词: penciler | 动词过去式: penciled/pencilled | 动词过去分词: penciled/pencilled | 动词现在分词: penciling/pencilling | 动词第三人称单数: pencils/pencils |

pencil lead

词形变化：

名词: penciler | 动词过去式: penciled/pencilled | 动词过去分词: penciled/pencilled | 动词现在分词: penciling/pencilling | 动词第三人称单数: pencils/pencils |

pencil lead

名词 pencil lead:

mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil

同义词：lead

pencil lead