concussions的音标？

People who have concussions often trouble thinking or remembering.患脑震荡的人通常存在思考和记忆障碍.Concussions also make a person feel very tired or angry.脑震荡也会使人感觉疲倦或愤怒.Some concussions are more severe than others.某些脑震荡后果较常规更为严重....

n.震荡( concussion的名词复数 )，脑震荡，冲击，震动...