The king was on a private visit to enable him to pray at the tombs of his ancestors.

国王在做一次私访以便能祭拜其祖坟。

《柯林斯英汉双解大词典》

A PRIVATE visit to the castle of Vaduz in Liechtenstein is a treat for many reasons.

私下到列支敦士登的瓦杜兹堡一游乃一大快事，之所以叫快事，理由多着呢。

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These visits including the state visit, the friendly visit, the working visit, the study visit, each kind of service visit, and the unofficial private visit and so on.

这些访问包裹正式访问的国事访问、友好访问、工作访问、考察访问、各种业务访问，以及顺道访问、非正式的私人访问，等等。

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There is a private museum here we want to visit.

VOA: special.2010.03.22

U.N.humanitarian chief John Holmes told the Security Council Thursday that during his recent visit to Khartoum, government officials made clear to him both in private and in public that new aid groups and those with new names and logos are welcome in the country.

VOA: standard.2009.06.11

Mr Ashraf will make a private visit to the shrine of a famous Sufi Muslim saint, in Rajasthan state.

BBC: Pakistan's Prime Minister Raja Pervez Ashraf

Former Japanese leader Yukio Hatoyama is also in Beijing on a private visit.

BBC: China 'to survey disputed East China Sea islands'

No public tours are available, but aerospace blogger Steve Harris posted some juicy details about his private visit to Skunk Works.

CNN: Where planes go to die