今日是五月的第一天。
劳动节，劳动节。这是五月的第一天。我们兴高采烈。
Labor Day, Labor Day. It's the first of May. We are happy and gay.
五月的第一天，2010年上海世博会首个公众开放日的问卷已转交。
The questionnaires have been handed out on the first of May, the first public Open Day of the Shanghai World Expo 2010.
五月的第一天，2010年上海世博会首个公众开放日的问卷已转交。
The questionnaires have been handed out on the first of May, the first public Open Day of the Shanghai World Expo 2010.
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