unannounced

音標(biāo)發(fā)音

Hollywood star Johnny Depp made an unannounced visit to a London primary school after receiving a letter from one of its pupils, BBC reported.
據(jù)英國(guó)廣播公司報(bào)道，好萊隖影星約翰尼·德普日前突然造訪了英國(guó)一所小學(xué)，衹因他收到該校一名小學(xué)生的信。
www.chinadaily.com.cn
We appreciate your interest in the jobs, but beyond the information listed in the postings themselves, we can't comment on unannounced projects.
我們很榮幸您能對(duì)我們的招聘信息感興趣，但除了已經(jīng)列出的招聘信息以外，我們不能對(duì)尚未發(fā)佈
Answer: It's really no fun, but we can't discuss future unannounced products.
答：這的確沒(méi)有樂(lè)趣，但我們不能討論還沒(méi)有發(fā)佈的未來(lái)産品。

On his way back, the president made an unannounced stop in Iraq.
The Bell 430 helicopter disappeared while flying through a heavy rain storm, en route to an unannounced inspection of a local district.
A military official tells VOA the Chairman of the Joint Chiefs of Staff, Admiral Mike Mullen, traveled to Germany Friday for an unannounced half-day meeting on a U.S.Air Base with the Afghanistan commander, General Stanley McChrystal.

Further questions were referred to McCain's office, which confirmed the unannounced trip but gave no details.
NPR: Britain: EU Ends Arms Embargo On Syrian Opposition

If someone arrives or does something unannounced, they do it unexpectedly and without anyone having been told about it beforehand.