Read Edit View history 刻苦钻研 kèkǔzuānyán study diligently Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 刻苦钻研/刻苦鑽研 · kèkǔzuānyán · study diligently 2026/03/04 刻苦钻研 / 刻苦鑽研 kèkǔzuānyán study diligently to study and research with great effort; to delve into 他在实验室里刻苦钻研，终于取得了突破。 created sense Mar 4, 2026, 02:25 AM