He had just arrived unannounced from South America.
他刚从南美来，事先也没通知。
I had an unannounced test, so I ditched class.
因为我害怕临时测试，所以我逃学了。
The school inspectors make an unannounced visit .
督学们进行了一次突击视察。
I hope you don't mind me dropping in unannounced.
希望你不介意我不请自来。
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。
A few unannounced features I'll let people discover on their own…
一些功能，我会突然让人们发现自己的…
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。
The best opportunities are usually the ones that pop up unannounced.
最好的机会常常在不经意间出现。
The manger dropped in unannounced at the office several times a week.
经理每星期都不经事先通知到办公室来几次。
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。
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。
The concept of property, unannounced to most people today, is a fairly new social concept.
财产的概念，现今大多数人不知道这是一个“相当新”的社会概念。
The concept of property, unannounced to most people today, is a fairly new social concept.
财产的概念，现今大多数人不知道这是一个“相当新”的社会概念。
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