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亚历山大.贝尔的简介英语翻译
亚历山大.贝尔的简介英语翻译
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2020-11-26 15:50
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AlexanderGrahamBell(March3,1847–August2,1922)wasaneminentscientist,inventor,engineerandinnovatorwhoiscreditedwithinventingthefirstpracticaltelephone.Bell'sfather,grandfather,an...
2020-11-26 15:53:10