once every half an hour, once every 30 minutes

listen to the pronunciation of once every half an hour, once every 30 minutes
Английский Язык - Английский Язык
half-hourly
once every half an hour, once every 30 minutes

    Расстановка переносов

    once eve·ry half an hour, once eve·ry 30 min·utes

    Произношение

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