The so-called "lead" in a pencil is not lead at all, but chiefly a different form of carbon called graphite. 铅笔中所谓的铅,并不是“铅”,而主要是一种不同形态的炭,称为石墨。
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. 令他吃惊的是,他发现蜡烛里的碳已经形成了纯碳的四种形态,包括:钻石、石墨和铅笔芯。
Perhaps the most surprising thing about the lead pencil is that it is not lead at all. And it is not a pencil. 可能关于铅笔最让人吃惊的事情是它根本就不是铅做的,而英语PENCIL也不是笔的意思。
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。
Ordinary so-called pencil lead is graphite, a three-dimensional form of carbon. 普通所谓的铅笔芯其实是石墨,一种三维结构的碳。
My first pencil box contained four wooden pencils, a razor, and a strip of sandpaper used to sharpen the lead. 我的第一个文具盒里有4只木质铅笔,一把小刀还有一张磨铅笔的砂纸。
The location analysis results of the pencil lead breaking test on thermal barrier coating showed the accuracy of this method. 对热障涂层进行铅笔芯断裂的定位分析验证了该方法的准确性。
How do you make a point on a pencil? Using a sharp blade or sharpener, you carve away the wood surrounding the lead and then some of the lead itself until the pencil's functional core is laid bare. 想想看,你通常怎麽做才能将铅笔削尖一点?你可以使用削刀或是削铅笔机,一步步将铅笔笔心外围的木头削去,让笔尖自然成形。
The color of an HB pencil lead is too light to be read by the machine. HB的铅笔铅芯颜色较浅,不能涂机读卡。
Have you got a spare pencil kate? Peter's broken the lead in his. 凯特,你有没有一支多余的铅笔?彼得把他的铅芯摔断了。
Experiments were carried out on sheet metal with the signal of pencil lead breaking as simulating source. 以铅笔芯折断产生信号为模拟源进行了试验验证。
It is widely used to manufacture high-temperature crucible used in metallurgy, lubricant used in the mechanical industry, electrode and pencil lead; 被广泛应用于制作冶炼上的高温坩埚、机械工业的润滑剂、制作电极和铅笔芯;
Use the knife/ pencil sharpener to turn the lead of the pencil into powder. 用小刀或削铅笔机把铅笔的笔芯弄成粉末状。
Lovely aromatics of Emperor Cherry, blackberry, and cedar in the nose underscored with a subtle hint of pencil lead shavings. 饶富樱桃、黑莓迷人的芳香以及细致的铅笔屑香味透露出杉柏木特有的气味。
Color pencil, water-soluble color lead, lead metal color, fluorescent color of lead, erasable color of lead. 彩色铅笔、水溶性彩铅、金属色彩铅、荧光色彩铅、可擦性彩铅。