Read Edit View history 质的飞跃 zhìdefēiyuè qualitative leap Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 质的飞跃/ 質的飛躍 zhìdefēiyuè qualitative leap 经过多年的研发，这项技术有了质的飞跃。 Edit Delete References Add reference No references for this word.