unannounced meaning in English
adj.
未经宣布的；未经通报姓名的。
Examples
- The principal keeps students and teachers on their toes with unannounced visits to the classroom .
校长经常事先不通知地去听课，使得学生、教师都不敢怠慢。 - Little as the vander luydens encouraged unannounced visits, he could count on being asked to dine .
尽管范德路易登家不大欢迎不速之客，但还是有可能请他吃顿饭。 - Ladies don ' t go calling on gentleman unannounced
女士不会不请自到地来找绅士的。 - He came into my mother ' s birthday party unannounced
他突然来到，我母亲的生日晚会 - Only very close friends drop by unannounced
他们或许会邀请大家到客厅吃点心、喝茶或咖啡。