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海南读者李忠贤希望上海著名的园艺师贺永清先生介绍几种观叶花卉的水培方法。贺先生热情地满足了他的要求。
Li Zhongxian, a reader from Hainan, hopes that Mr. He Yongqing, a famous horticulturalist in Shanghai, will introduce several hydroponics methods of foliage flowers. Mr. He enthusiastically satisfied his request.