求翻译：Giovanoli等用过硫酸铵氧化一水硫酸锰溶液的方法制得γ-MnO2晶体。Welsh报导了用NaClO3氧化MnSO4制备二氧化锰的方法。张其星等[13] 用Cl2氧化MnSO4的酸性溶液制得二氧化锰。是什么意思？

giovanoli such as ammonium persulfate oxidation of a manganese sulfate solution methods obtained γ-mno2 crystal. welsh reported using the naclo3 to oxidation mnso4 Preparation of manganese dioxide. Its star, [13] with cl2 oxidation mnso4 acid solution was prepared manganese dioxide.

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Giovanoli urgently needs the ammonium persulfate oxidation sulfuric acid monohydrate manganese solution the side legal system γ-MnO 2 crystals.Welsh reported oxidizes the MnSO4 preparation manganese dioxide with NaClO3 the method.Opens its magnitude (13) to oxidize MnSO4 with Cl2 the acid solution s

Giovanoli, using ammonium persulfate oxidation of manganese sulfate monohydrate solution method of gamma-MnO2 crystals. Welsh reports preparation method of manganese dioxide NaClO3 MnSO4. Zhang Qixing [13] Cl2 MnSO4 acidic solution of manganese dioxide.