Read Edit View history 刻苦钻研 kèkǔzuānyán study diligently Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 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。 Edit Delete References Add reference No references for this word.
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。 Edit Delete