lesson learned from someone's else mistake; object lesson; food for thought; stones from other mountains (can be used to polish one's own gems)idiomatic expressionsee also 他山の石以て玉を攻むべし
lesson learned from someone's else mistake; object lesson; food for thought; stones from other mountains (can be used to polish one's own gems)idiomatic expressionsee also 他山の石以て玉を攻むべし