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1·The pencil lead is broken.

铅笔芯断了。

2·The pencil lead is broken.

我需要一支软铅笔芯的铅笔。

3·I'm out of pencil lead.

铅笔芯用完了。

4·Do you think pencil lead will wash out of this white shirt?

你认为铅笔痕能从这件白衬衫上洗去吗？

5·Layers of graphene make up the graphite found in pencil lead.

铅笔芯里的石墨就是由多层石墨烯组成的。

6·Health professionals currently lead the main box and pencil lead.

公司目前主要专业生铅芯盒和铅笔芯。

7·The graphite needed to make pencil lead was found mostly in England and Prussia.

而制造铅笔芯的石墨，多数产于英国和普鲁士。

8·A discovery made from pencil lead is promising to change the future of the electronics industry.

科学家一项从铅笔芯中作出的发现，势必将改变电子产业的未来。

9·Each one was grooved to half the thickness of a pencil lead. Two slats were glued together with the lead between.

每一根木条中开了一条只有铅笔直径一半宽的槽，两个木条用胶粘合在一起，铅笔芯置于两个木条中间。

10·He found inspiration in an unlikely place: the physics of condensed matter, including the material of the moment - pencil lead.

他从一个不太可能的地方找到灵感：凝聚态物理，包括之前提到的材料——铅笔芯。