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.

互联网

Concussions also make a person feel very tired or angry.

脑震荡也会使人感觉疲倦或愤怒.

互联网

Some concussions are more severe than others.

某些脑震荡后果较常规更为严重.

互联网