常見例句雙語例句Layers of graphene make up the graphite found in pencil lead.鉛筆芯里的石墨就是由多層石墨烯組成的。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。To his surprise, he discovered that the carbon in the candle wax had formed all four types of pure carbon, including diamonds and graphite, or pencil lead.令他吃驚的是，他發(fā)現(xiàn)蠟燭里的碳已經(jīng)形成了純碳的四種形態(tài)，包括：鉆石、石墨和鉛筆芯。權(quán)威例句Each day he dotted the virtues he failed to fulfill with a black lead pencil.FORBES: On The Cover/Top StoriesAn analogy: think of a pencil, where the lead in the middle is the cellulose fiber, surrounded by unwanted lignin and hemicellulose.FORBES: EthanolLater versions would sandwich the lead between two pencil halves and glue them together.FORBES: Magazine Article 返回 pencil lead