变质 biànzhì HSK7 spoil Definitions Defs Origin Strokes Stroke Words Sentences Sents 变质岩 biànzhìyán metamorphic rock metamorphic rock (geology)蜕化变质 tuìhuàbiànzhì degenerate to degenerate morally; to become depraved变质作用 biànzhìzuòyòng metamorphism metamorphism (geology)易变质 yìbiànzhì perishable