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1·The quantity of MOB was much higher than the background value.

甲烷氧化菌的数量明显高于背景值。

2·Its radon pollution is low, near to the environment background value.

氡污染水平较低，接近环境本底水平值。

3·The background value of Beryllium element in soil of China was studied.

本文介绍了我国土壤中铍的背景值结果。

4·The background value of water environment is the major subject of geochemical research of water environment.

水环境背景值是水环境地球化学研究的重要内容。

5·Results The equivalent sound levels (LAeq) were qualified in spite of higher background value of noise in this areas.

结果该区域背景噪声值较高，但其等效声级达标。

6·According to the falling rate, the content of mercury in the deposit will reach the background value after 32.57 years.

按此下降速率，沉积物的汞含量经32.57年可达到背景值水平。

7·In processing geochemical data, the fracture theory and background value separating method are introduced in the system.

同时在化探数据的处理上引入了分形理论及背景值分离的方法。

8·The effective measures that determined background value of urban air pollution and improved forecast accuracy was proposed.

首次提出了空气质量环境背景值的确定等提高城市空气污染预报准确率的有效措施。

9·This area is the geochemical one with high copper background value and has the favourable condition for copper mineralization.

本区为铜的地球化学高背景场区，具有较好的铜矿成矿条件。

10·The main result of study is as follows: (1) Citrus orchard soil greyish brown purple mud constant element background value in Jiangjin.

主要研究结果如下：(1)江津市柑橘果园土壤灰棕紫泥常量元素背景值。