initiation
noun uk/ɪˌnɪʃ.iˈeɪ.ʃən/ us/ɪˌnɪʃ.iˈeɪ.ʃən/
(START)
[ U ] formal开始；发起；实施
an occasion when something starts
Lawyers for the couple have announced the initiation of divorce proceedings. 夫妇双方的律师已声明进入离婚诉讼程序。
(INTRODUCTION)
[ C or U ]（某项活动或技能的）入门，初学
an occasion when someone is first introduced to an activity or skill
My initiation into the mysteries of home brewing was not a success. 我初学自家酿酒并不成功。