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    打出手

    dǎchūshǒu

    1. to fling back weapons hurled at one by attackers (acrobatic performance in Chinese opera)
    2. to come to blows; to start a fight

    他们因为一点小事就打出手了。 Tāmen yīnwèi yīdiǎn xiǎo shì jiù dǎchūshǒu le.