... 浅层混响 shallow reverberation 浅层水 shallow seated groundwater ; shallow water 背部浅层 Superficial Back ...
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Based on the calculation and analysis of comprehensive index-polluted, shallow-seated groundwater in Dongtinghu district can be divided into 4 classes of serious, middle, lower and no pollution.
据综合污染指数计算分析，洞庭湖区域浅层地下水分为重度、中度、轻度和非污染4个等级。
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