When we conduct experiments using nickel or cobalt sulfides, we see that carbon addition occurs primarily by carbonylation-the insertion of a carbon and oxygen molecule, or carbonyl group.

要是我们以镍或钴的硫化物做实验，增碳过程主要循羰基化途径进行，也就是塞入一个羰基(由一个碳原子、一个氧原子组成)。

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The capacity of mine containing cuprous sulfides and sulfides with disseminated PGMs is rising faster than mines deriving PGMs from nickel-rich sulfide ores, he said.

FORBES: USGS: Sources Of PGMs From South Africa, Russia Likely To Change