1. When eutrophic condition of water body is serious, algae on water surface proliferate and cover the water surface flakily to form water blooms or red tides.
水体严重富营养化时，水面藻类增殖，成片或成团地覆盖在水体表面，形成水华或赤潮。
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2. When eutrophic condition of water body is serious, algae on water surface proliferate and cover the water surface flakily to form water blooms or red tides.
