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1·She just turned up unannounced on my doorstep.

她未打招呼就来到我家门口了。《牛津词典》

2·He had just arrived unannounced from South America.

他刚从南美来，事先也没通知。《柯林斯英汉双解大词典》

3·The school inspectors make an unannounced visit .

督学们进行了一次突击视察。

4·Only very close friends will just drop by unannounced.

只有非常亲密的朋友才会不打招呼突然造访。

5·Let's see how it likes the rudeness of an unannounced visit.

让我们看看“它”觉得这种突然拜访的无礼性如何。

6·Much to the shock of everyone, Palmer comes unannounced to CTU.

很多反恐组的工作人员大吃一惊，帕默竟然没有打招呼就来到了反恐组。

7·This means that unplanned and unannounced server outages will happen.

这意味着一定会出现计划外的服务器宕机。

8·As a rule I went in unannounced, as though I were one of the family.

通常我都说来就来，好像我是那个家的一员。

9·Since they come unannounced, these moments can't be planned or forced.

由于它们毫无预警的来临，所以这些时刻是不能被规划或强制发生的。

10·Answer: It's really no fun, but we can't discuss future unannounced products.

答：这的确没有乐趣，但我们不能讨论还没有发布的未来产品。

突然的

1·Flashing lights, spinning widgets, and videos that start unannounced don’t make the sale. Clear, informative content does.

闪烁的亮光、旋转的工具栏以及突然开始播放的视频，会让销售泡汤；而清晰、信息量足的内容则可以促成交易。

2·Let's see how it likes the rudeness of an unannounced visit.

让我们看看“它”觉得这种突然拜访的无礼性如何。

3·On Christmas Eve 2008, the Unsafe showed up and played an unannounced set at 3 in the morning.

2008年圣诞前夜那次，一场很不安全的演出，而且在早晨3点的时候发生了突然事件。

4·My first night in Saigon I paid an unannounced visit to my father's Cousins.

到西贡的第一个晚上，我给父亲的堂兄堂弟们来了个突然袭击。

5·Depp showed up in Beatrice's classroom virtually unannounced in full Pirates of the Caribbean costume.

德普在没有事先通知的状况下，用他在电影《加勒比海盗》的海盗造型，突然出现在碧翠丝的学校。