名词
中文翻译：铅笔芯
同义词：
['lead core', 'lead pencil core例句：1. The pencil core is the part of the pencil that holds the lead in place.（铅笔芯是铅笔中保持铅芯固定的部位。）']
例句：
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1. The pencil core is the part of the pencil that holds the lead in place.
铅笔芯是铅笔中保持铅芯固定的部位。
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2. The pencil core was made from a special type of graphite.
铅笔芯是由一种特殊类型的石墨制成的。
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3.The pencil core needs to be replaced regularly to ensure smooth writing.
铅笔芯需要定期更换，以保证书写顺畅。