求翻译：1930年4月，胡佛总统下令，挨家挨户调查失业的情况，这是美国历史上第一次联邦失业人口普查。总共已报告失业的可雇佣人员有300万稍多一点，相比之下，有4,500万人有报酬地被雇佣。但大潮涨得很快，1931年1月，商务部根据取样所作的一项专门普查显示有600万人失业。是什么意思？

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April 1930, Hoover ordered by President, going door-to-door survey unemployment situation, this is the first time in history the United States Federal Unemployment census. The report has been a total unemployment may employ staff members have a little more than 3 million, compared with 4 to 5 millio

In April, 1930, President Hoover issued an order, from house to house investigated the unemployment the situation, this was in the American history the first federation unemployed population general survey.Altogether had reported the unemployment may hire the personnel to have frequently 3,000,000,

In April 1930, President Hoover ordered House-to-house survey of unemployment, which is a United States federal unemployment population census for the first time in history. Total unemployment has been reported to employ people in little more than 3 million, compared to 45 million were paid to be hi

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