sān zhé qí gōng
肱:手臂。几次断臂,就能懂得医治断臂的方法。后比喻对某事阅历多,自能造诣精深
春秋·鲁·左丘明《左传·定公十三年》:“三折肱知为良医。”
三折其肱作宾语、定语;指久病成良医。
After having broken his upper arms for three times, he becomes a good surgeon.