If, however, they are subjected instead to pyrolysis-a process of controlledburning in a low-oxygen atmosphere-the result is charcoal, a substance that is mostly elemental carbon.
但如果经过高温分解—在低氧环境下有控制的燃烧—它将会形成木炭,其大部分是永久碳。
3
Fort Stewart has long used controlledburning in its busiest training areas to prevent live ammunition from causing unplanned fires. Local species gravitated toward those scorched open areas.