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Impurity

usgb/ɪmˈpjʊrəti/Volume
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Physical ContaminantsPlay
Refers to tangible substances that can often be seen or felt. SlideThe factory's runoff introduced impurities into the riverbed.
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Measure and ActPlay
Often used to indicate that action is needed to remove the impurities. SlideWe need to measure the impurity levels before purifying the water.
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Purity ContrastPlay
Highlights the difference from a pure state; anything added that is unwanted. SlideDetecting impurities in this chemical solution is critical for the experiment.