hydroponics
noun [ U ] biology specialized uk/ˌhaɪ.drəˈpɒn.ɪks/ us/ˌhaɪ.droʊˈpɑː.nɪks/
（植物的）无土栽培法，水栽法
the method of growing plants in water to which special chemicals are added, rather than growing them in earth
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