But the designers had also promised to make the first low carbon Olympic flame, and then couldn't come up with anything good enough.
尽管设计者们当初信誓旦旦地保证这会是奥运会史上首个低碳火炬，他们现在却无论如何也做不到尽善尽美。
2
When carbon unites with oxygen, it forms a colorless, odorless, and tasteless gas called carbon dioxide, which is heavier than air and will extinguish a flame.
当碳与氧结合形成一种无色、无味、无嗅的气体叫做二氧化碳，它比空气重，可以灭火。
3
Carbon nanotubes synthesis using diffusion flame is a kind of novel technique.