The former president paid an unofficial visit to China.

前总统到中国进行了私人访问。

《牛津词典》

U. S. officials declined to comment in detail on Mr. Carter's unofficial visit. 'We do not want to jeopardize the prospects for Mr.

美国官员拒绝就卡特此次非官方访问的细节置评。

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The 27-year-old second in line to the throne flew out of Wellington Tuesday morning bound for Sydney for a three-day unofficial visit to Australia.

这位27岁的英国王位第二继承人于当天上午离开惠灵顿，飞往悉尼，将对澳大利亚进行为期三天的非正式访问。

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Twenty million visit the city every year. City officals also point out that there are thousands of unofficial residents of Venice: students and island inhabitants who don't officially register.

VOA: standard.2009.11.14

The Grand Mufti, Ali Gomaa, said on his Twitter account that he had made an unofficial visit to the mosque, one of the three holiest places in Islam.

BBC: Egypt's grand mufti visits Jerusalem's al-Aqsa mosque

Many of the miners took an unofficial day's holiday for the royal visit, which meant only 117 reported for work on the Monday night shift.

BBC: Cadeby Main mining disaster marked 100 years on