a system with loudspeakers used for giving information in a public place 天朗擴音系統 to make an announcement over the Tannoy 通過天朗擴音系統發布通知
Word Origin1920s: contraction of tantalum alloy, which is used as a rectifier in the system.
👨🏻🏫 Mr. Ng 牛津詞典 📚 – oxford.mister5️⃣.net
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