1、The pencil lead is broken.
鉛筆芯斷了。

2、A discovery made from pencil lead is promising to change the future of the electronics industry.
科學家一項從鉛筆芯中作出的發(fā)現(xiàn)，勢必將改變電子產(chǎn)業(yè)的未來。

3、Do you think pencil lead will wash out of this white shirt?
你認為鉛筆痕能從這件白襯衫上洗去嗎？