low-oxygenCOCA¹⁰⁵⁰⁸⁰Economist²⁹⁹⁰¹⁺⁴ 基本例句 🌏低氧 If, however, they are subjected instead to pyrolysis—a process of controlled burning in a low-oxygen a tmosphere—the result is charcoal, a substance that is mostly element a l carbon. 不过如果他们转而被强迫热分解一种在低氧环境中人工燃烧的过程，就会产生木炭，一种基本由碳组成的物质。 blog.sina.com.cn