We are to gain experience since this is the first time for us to hold such a large-scale and long-duration world exposition.

由于是第一次举办如此大规模、长时间的世博会，我们还缺乏经验。

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London hosted the first ever World Exposition in 1851.

1851年，伦敦举办了第一届世界博览会。

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This was the first time that China hosted top-class specialized world exposition recognized by the Bureau of International Exhibition, the administrative body of the world exposition.

这是中国第一次举办由世界博览会管理机构即国际展览局确认的顶级专项世界博览会。

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''Chansons de Printemps'' was first exhibited at the famous Paris World Exposition in 1889.

FORBES: Pricey Printemps