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A kind of loudspeaker that uses the vibrations of a volume of ionized air in place of those of a diaphragm.
1920s (in an earlier sense). From iono- + -phone.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。