Na mgbanwe nke ahịa, ọchịchọ nke ígwè na shelf osisi na-abawanye.N'otu oge ahụ, ngwaahịa shelf na-enweghị isi na-apụta n'otu n'otu.Mgbe ahụ, olee isi ihe kwesịrị ịṅa ntị mgbe ị na-azụta ihe nkedo ígwè na osisi?Li's shelf Xiaobian bụkwa onye ...
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