铅笔芯断了。
我需要一支软铅笔芯的铅笔。
铅笔芯用完了。
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？
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。
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。
The lead broke on this pencil, so I have to sharpen it.
这支铅笔的笔芯断了，所以我只好削尖它。
He grabbed a pencil, and the lead immediately broke.
他抓起一支铅笔，铅笔芯立刻就断了。
我需要一支软铅笔芯的铅笔。
Pieces of bread were used to erase lead pencil before rubber came into use.
在橡皮擦使用之前，人们用一片面包来擦铅笔字。
Many transistors are smaller than the eraser on the end of a lead pencil.
很多晶体管都比铅笔头上的橡皮还要小。
I need a pencil with a soft lead.
我要一枝笔芯柔软的铅笔。
Drink some more of this, boy! It'll put lead in your pencil!
小伙子，多喝点儿这个，喝了保你精力充沛！
His classmates began to write, but the lead inside child's mechanical pencil kept broken.
同学开始写了，大家都一直在写，可是小孩的自动铅笔芯不停断掉。
The lead pencil is one of the most used pieces of merchandise in the world.
铅笔是这个世界上使用的最多的商品之一。在所有的书写工具中，它最简单，最方便，最便宜。
The lead pencil is one of the most used pieces of merchandise in the world.
铅笔是这个世界上使用的最多的商品之一。在所有的书写工具中，它最简单，最方便，最便宜。
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