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单词	phototube
释义	phototube noun pho·​to·​tube ˈfō-tō-ˌtüb  -ˌtyüb : an electron tube having a photoemissive cathode whose released electrons are drawn to the anode by reason of its positive potential Word History First Known Use 1930, in the meaning defined above
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英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。