自发 zìfā HSK7 spontaneous Origin Definitions Defs Strokes Stroke Words Sentences Sents 自动自发 zìdòngzìfā proactive to act on one's own initiative自发对称破缺 zìfāduìchènpòquē spontaneous symmetry breaking spontaneous symmetry breaking (physics)自发电位 zìfādiànwèi EEG electroencephalogram (EEG)自发粉 zìfāfěn self-rising flour