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con.cus.sionkEN5kQF7[nn [U]temporary damage to the brain caused by a fall or hit on the head or by violent shaking, and resulting in various effects, such as a loss of consciousness and a desire to vomit震荡，剧烈摇动He's been a bit dizzy and confused since the accident. Do you think it's mild concussion?自车祸以来，他一直有点头晕和思路混乱。你认为那是不是轻微脑震荡?
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