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  1. Oxford Dictionary

    alternating current

    英式

    • n.
      an electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.

    • noun: alternating current, plural noun: alternating currents

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    alternating current

    • IPA[ˈôltərˌnādiNG ˈkərənt]

    美式

    • n.
      an electric current that reverses its direction many times a second at regular intervals, ...

    Oxford American Dictionary