基本解释[教育学]游离烃气英汉例句双语例句The most effective phase of hydrocarbon migration is in the oil phase or free gas phase, which directly forms the reservoirs without changing the phases.石油以油相运移、天然气以气相运移最为有效，无需相态转变就能直接成藏。free hydrocarbon gas更多例句专业释义教育学游离烃气