变质作用 Traditional 變質作用 biàn zhì zuò yòng 🔊 metamorphism (geology) + Keep this word Meanings biàn zhì zuò yòng 變質作用 metamorphism (geology) Its characters 变biànto changeHSK 3质zhìcharacter作zuòto do; to engage in用yòngto use; to make use of; to employHSK 3