annunciation        
noun uk/əˌnʌn.siˈeɪ.ʃən/ us/əˌnʌn.siˈeɪ.ʃən/
 [ C ] formal通告,公布 
an act of announcing something
  a clear annunciation of their policy 对其政策的清楚通告 
 the Annunciation [ singular ] religion 天使报喜,圣母领报
in Christianity, the announcement of the Angel Gabriel to Mary that she would be the mother of Jesus