It can not only prolong the retention period of flavor, but also avoid flavor metamorphism because of tobacco burning at the high temperature. 因為這一方法既能延長(cháng)香精的保留期，又能避免煙絲高溫燃燒而使香精變質(zhì)的缺點(diǎn)。
The khondalite lithology is composed of a suit of metamorphic aluminium-sedimentary rock.During the Jinning movement, the sedmentary rock experienced four stages of metamorphism. 明確黃陵地區孔茲巖系為一套變質(zhì)的富鋁質(zhì)沉積巖組合，在晉寧期造山運動(dòng)期間該套巖系經(jīng)歷四期變質(zhì)作用。
