The results showed the surface contamination produced in sample preparation and treatment can be eliminated if the sample was sputtered for enough time.

实验表明：样品经足够长时间的溅射，可以消除样品制备和处理过程中的表面污染，可以为其它高纯材料的检测提供可靠的科学依据。

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In order to know the condition of microorganism contamination of hospital air in Shenyang, plate sedimentation method was used to sample and examine the indoor air in 71 hospitals.

为了解本市医院空气微生物污染情况，采用平板沉降法对71所医院室内空气进行了采样检测。

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Actual work situation and oil sample inspection proofed that the oil contamination of hydraulic system is effectively controlled and the work reliability and life of the bench are further increased.

工况运行及油样检查结果表明，液压系统的油液污染得到了有效控制，试验台工作可靠性及使用寿命也有了进一步提高。

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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