Know the news dominant position of main unit reconnaissance survey adequately.

充分熟悉基本单位普查的信息优势.

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This is up to now reconnaissance survey with the largest scale on population phylogeny.

这是迄今为止人口发展史上规模最大的一次普查.

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However, small ore deposits are characterized by a low degree of geological studiedness only reconnaissance survey.

但小型矿床一般只经过普查工作,研究程度低.

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