Three housewives clucked knowingly, "This is called clean vegetables, it's very popular. This way you could grow food at the South Pole or in outer space."
兩三個家庭主婦結伴而來，嘻嘻哈哈地指著「無土栽培」的牌子，十分內行的說：「這種菜就叫清潔蔬菜，現在很流行的；以後到南極、上太空，都得這樣種菜。」