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。

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There are different education value orientations exist in different culture background and social environment.

在不同的文化背景与社会环境中，存在着不同的教育价值取向。

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Environment administrative authority and public's environmental rights are two kinds of distinct rights with the same background of occurrence and value orientations.

环境行政权与公民环境权是两种不同属性的权利，它们产生的背景以及价值取向是一致的。

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