unannounced
柯林斯词典
1. ADJ If someone arrives or does something unannounced, they do it unexpectedly and without anyone having been told about it beforehand. 未事先通知的
He had just arrived unannounced from South America. 他剛從南美來，事先也沒通知。
返回 unannounced
1. ADJ If someone arrives or does something unannounced, they do it unexpectedly and without anyone having been told about it beforehand. 未事先通知的
He had just arrived unannounced from South America. 他剛從南美來，事先也沒通知。