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HSK levels

    一头 一頭

    yītóu

    1. one head; a head full of sth
    2. one end (of a stick); one side
    3. headlong; directly; rapidly; simultaneously

    他一头扎进书堆里,忘记了吃饭。 Tā yītóu zhājìn shūduī lǐ, wàngjìle chīfàn.