英语词汇“Public Switched Telephone Network”的读音、翻译、释义、用法及例句-语文网

词汇	Public Switched Telephone Network
释义	Public Switched Telephone Network 公用电话网（=PSTN）是以传统铜线作为传递媒介的电信局，且是一种传统过时的电话网路，设备复杂而且维修不易，频宽窄，且时常会有许多杂音及停顿，自然就不能如光纤网路那般提供许多附加服务。
随便看	nuclear nuclear-armed nuclear energy Nuclear Energy Agency nuclear family nuclear fission nuclear-free nuclear freeze nuclear fusion nuclearization nuclearize nuclear magnetic resonance nuclear physics nuclear power nuclear-powered nuclear power plant nuclear reaction nuclear reactor nuclear threshold nuclear umbrella nuclear waste nuclear weapon nuclear winter nuclease nucleate

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