A 1级是专业性博览会的最高级别。

A1-class professional Expo is the highest level.

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1999年，中国在云南昆明成功举办了世界园艺博览会，显示中国已具备举办综合性世博会的能力。

The World Horticulture Expo successfully held in Kunming, Yunnan Province of China in 1999 displayed China's ability to host a comprehensive World Expo.

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在费城举办的世博会更具关联性，这让我们想起上海世博会并非第一届标志着举办国快速崛起的博览会。

That World’s Fair held in Philadelphia has broader relevance, reminding us that Shanghai’s Expo is not the first to signal a country’s rapid rise.

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