良性 liángxìng HSK7 benign Origin Definitions Defs Strokes Stroke Words Sentences Sents 良性肿瘤 liángxìngzhǒngliú benign tumor 再生不良性贫血 zàishēngbùliángxìngpínxuè aplastic anemia 良性循环 liángxìngxúnhuán virtuous cycle virtuous cycle (positive feedback loop)