To train for a long time in preparation for a crucial moment; long-term preparation for a specific, important use.
他平时刻苦学习，正是“养兵千日，用在一时”，才顺利通过了这项重要的资格考试。
He usually studied diligently, truly embodying "train for a thousand days for one moment of use," which is why he successfully passed this important qualification exam.
Next Idiom