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。
2
When you trace a pencil on a piece of paper, these layers are cleaved, leaving thin layers of these carbon sheets.
当你用铅笔在纸上划写的时候，这些碳原子薄层裂开并留在纸上。
3
Windmills from old car parts and car batteries and artificial sunlight from carbon arc lamps using pencil leads is possible, however.