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污染物水平
在一个特定的区域代表污染浓度的一个值,通常由测量和记录设备决定。
stresses
environ.
уровень загрязненности конкретным веществом
(Величина концентрации загрязняющего вещества в конкретном регионе, часто определяемая измерительным и регистрирующим прибором)
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