And the way it works is that there's a pump at the bottom, which periodically sends some of this liquid nutrient solution up to the top, which then trickles down through plants' root systems that are suspended in clay pellets -- so there's no dirt involved.
この仕組みを説明すると 装置下部のポンプが定期的に養液を上部へ送り 粘土粒に支えられた植物の根に 滴らせます 土は使いません