It presents its existence value through the essential factors as static results, contents, learning experience, evaluation, certificates and dynamic operation course suitable for the age stage.

它通过静态的结果、内容、学习经验、评估以及证书等构成要素与适应年龄阶段的动态操作历程显示出自己的存在价值。

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The method not only can overcome static-space evaluation of groundwater quality depending on monitoring value in certain year, but also sum up standard excess rate, pollution ind…

该方法既克服了依靠某年监测值对地下水质的静态空间评价，又可将超标率、污染指数和超标面积综合起来，完成地下水水质的动态评价。

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