The school inspectors make an unannounced visit .

督学们进行了一次突击视察。

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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。

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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。

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German Chancellor Angela Merkel has arrived in northern Afghanistan on an unannounced visit, amid heavy security.

BBC: Germany's Merkel makes unannounced visit to Afghanistan

Last year, hoping to lessen the controversy, he made an unannounced visit in April.

BBC: Anger at Japan PM's shrine visit

And there's more: Mr. Clinton shocked staffers at the party's current headquarters by making an unannounced visit Thursday.

CNN: Jonathan Karl: Reporter's notebook