Accurately analyses hydraulic system contamination level, which can help designers to configure filter, optimize the system and design more stable hydraulic system.

准确地对液压系统污染度分析，可以辅助设计者合理配置过滤器、对系统进行优化，设计出性能更加稳定的液压系统。

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With this method, we can determine the water quality and the contamination level in some region objectively and directly by evaluating the quality of the regional water environment.

利用水环境质量指数法能较为客观、直接地反映某区域水体的水环境质量或者污染程度。

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Advantages sof direct sampling are that areas hardest to clean and which are reasonably accessible can be evaluated, leading to establishing a level of contamination or residue per given surface area.

直接取样的好处是可以评估难以清洗和相当容易接近的区域，使得可确定每个给出的表面区域的污染物或残留物的级别。

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The level of contamination was highest immediately around the mannequin, but evidence was also found up to 3.5m away, the study, published in the Building and Environment journal, found.

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"The level of contamination suggests that Comigel was not following the appropriate production process for our Tesco product, and we will not take food from their facility again, " said Tim Smith, a Tesco executive.

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They test nearby water wells to determine the level of naturally-occurring methane and other contamination before and after drilling in order to ensure that their drilling and completion activities have not caused any issues.

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