initiation ceremony
noun [ C ] uk/ɪ.nɪʃ.iˈeɪ.ʃən ˌser.ɪ.mə.ni/ us/ɪ.nɪʃ.iˈeɪ.ʃən ˌser.ɪ.mə.ni/
入会仪式
a process or event that a person takes part in to become an official member of a group
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