discoloring

And, in fact, some algae can be harmful without discoloring the water.

而事实上, 有些藻类可以有害却不会使水变色.

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The mechanism of the improvement and discoloring the adsorbents andthe additive was elucidate.

从理论上阐述了提高粉煤灰基质多孔吸附材料吸附、脱色性能的机理.

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