The official promotion campaign of the 2010 World Expo was launched in Rome yesterday by Italian and Chinese officials in an opening ceremony featuring traditional dragon dances.

世博网3月16日消息：“2010中国世博旅游年全球百城世博旅游推广月”活动15日在意大利首都罗马举行启动仪式。

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From 1920, the IOC decided that it should form an official part of the opening ceremony.

从1920年开始，国际奥委会决定将放飞和平鸽作为开幕式上的一个正式部分。

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That title became official at a recent ceremony in New York for the opening of an exhibition called "Welcome to Gulu."

VOA: special.2009.06.01

The official opening ceremony at the Olympic Stadium in London will be on Friday, 27 July, 2012.

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The new service was announced on Monday by Deputy First Minister Nicola Sturgeon during the official opening ceremony of Campbeltown New Quay.

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An official opening ceremony, organised by the council, could then be arranged.

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