The third part describes the basic circumstance of the whole investigation sample.

第三部分，主要描述了调查样本的基本情况。

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The second chapter introduced with emphasis studies the region survey and the investigation sample essential feature.

第二章重点介绍了研究区域概况与调查样本的基本特征。

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Taking magnesium alloy AZ91D as an investigation sample, the pretreatment process for electroplating of highly pure magnesium alloy is investigated by means of basic zinc plating processing.

用AZ 91 D镁合金制样，研究了采用碱性镀锌工艺对高纯镁合金进行电镀的预处理工艺性能。

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"This is probably the only definitely habitable environment that we've described and recorded, " said Paul Mahaffy, principal investigator for Curiosity's Sample Analysis at Mars investigation at NASA's Goddard Space Flight Center.

CNN: NASA: Yes, Mars could have hosted life

The swimmer who, under her maiden name Michelle Smith, won three gold medals at the 1996 Olympic Games, is under investigation by International Swimming Federation after it said the doping sample taken in November last year showed clear signs of contamination.

BBC: Irish swimmer denies drugs claims

Its investigation focused on 600 of the most serious complaints, and a sample audit of suspect votes at 3, 377 polling stations.

BBC: Afghan election goes to run-off