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丈二和尚[金刚]摸不着头脑[zhàng èr hé shang mō bù zháo tóu nǎo]1.■unable to make head or tail of ...; be all at sea; be completely at a loss; be quite puzzled; be in the dark; puzzled; so confused that one hardly knows whether he is standing on his head or hells; You can't touch the head of the ten-foot monk -- you can't make head or tail of it.:Being new here, I'm very much in the dark myself!我刚来， 真是丈二和尚摸不着头脑!