´Ü¾î : concussion / ¹ßÀ½ : ÄÁÄ¿¼Ç
¶æ : ³úÁøÅÁ
¶æ(¿µ¾î) : If you suffer concussion after a blow to your head, you lose consciousness or feel sick or confused.; A violent shock to some organ by a fall or a sudden blow.
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¶æ : The two most common concussion symptoms are confusion and amnesia.