She just turned up unannounced on my doorstep.
她未打招呼就来到我家门口了。
an unannounced increase in bus fares
公共汽车票价未经公告的上涨
1.未经宣布的;未经通报姓名的
1.unexpectedly
1.My immediate thought was that his wife would probably be furious that he had brought home a young female hitchhiker, unannounced .
我立刻就想到她的妻子可能会很愤怒，因为没有事先说好就载一名年轻的女性回家。
2.One more song remains unannounced, the companies said in a statement, but did not disclose when it would be revealed.
两家公司在声明中说，仍有一首歌曲没有公布，但没有透露最后一首歌曲的公布时间。
3.Her curiosity aroused, Mrs. Huber tried to think of a reason for dropping in on me unannounced.
她觉得很好奇，Huber太太想了一个不请自来的理由。
4.Americans usually like to have advance notice when people come to see them. Only very close friends drop by unannounced.
美国人通常喜欢访客事先通知他们，只有非常亲密的朋友才可以不请自来，尤其当访客要待好几天时更是如此。
5.Does the company conduct random, unannounced internal audits of this facility's security systems, processes, and procedures?
公司是否进行非定期的未事先通知，对该厂区安全系统、操作工艺和程序进行内部审计？
6.Reporters who make unannounced visits to the city before video games and found that the door has been closed gaming city.
记者来到曾暗访的电玩城前，发现这些电玩城的大门已经紧闭。
7.Suppliers will be advised of these visits in advance but we reserve the right to make unannounced visits too.
拜访工厂之前，供应商将提前被通知，但我们也保留做不预先通知拜访的权利。
8.The lessons come unannounced. But to aid you upon your entry into the Real World, A few of your predecessors have complied some sage advice.
课程总会不期而至，但为了在你们踏入社会时能助一臂之力，有些先行者总结了一些饱含智慧的建议。
9.frequent announced and unannounced monitoring activities to verify compliance with the terms of the written purchasing contract.
频繁进行事先声明及未声明的审查活动以确保该书面购买合同得以贯彻实施。
10.The United States has voiced regret to Japan after a US nuclear submarine made an unannounced visit to a Japanese port Monday.
美国发表声明对美国核潜艇于周一冒犯了一个日本港口向日本表示道歉。