translation.en: 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.
translation.zh: 系统通过底部的水泵运转 水泵定期将营养液运输到顶部 然后一点一滴流经植物根系 根长在黏土颗粒中－ 这样系统不需要泥土