Guòduō de piāofú zhíwù huì zǔ'ài shuǐxià guānghé zuòyòng.
Too many floating plants can block underwater photosynthesis.
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Ecology term, contrasted with 沉水植物 (submerged plants) and 挺水植物 (emergent plants). Floating plants are rootless or unanchored, drifting on the water surface.
