- 更多网络例句与格拉福风留声机相关的网络例句 [注:此内容来源于网络,仅供参考]
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Both his mother and his wife were deaf, hence his interest in acoustics. Others had created working phones, but Bell gave us the first commercially practical telephone, as well as the metal detector and the graphophone, an improved version of the phonograph.
亚历山大-格雷厄姆-贝尔的母亲和妻子都是聋子,所以,他对声学很感兴趣,其他人研制了工作电话,而贝尔为我们送出第一个商业实用电话,和金属探测器以及改良版留声机——格拉福风留声机。