【少不经事】〖shào bù jng shì〗[be too young and unable to understand how people should behave; be still wet behind the ears; green; inexperienced and easily fooled]

少成若性诵诗典，

不步人脚刻钻研。

经世奇才冠高考，

事捷功倍夺状元。

年纪轻，没有经历过什么事情。指经验不多。Young, never experienced anything. Describe not much experience.同：少不更事。