VOA慢速英语:Blood Test Shows Concussion Injury

concussion – n. an injury to the brain that is caused by something hitting the head very hard

symptom – n. a change in the body or mind which indicates that a disease is present

dizziness – n. the act of being dizzy -- feeling that you are turning around in circles and are going to fall even though you are standing still

anxiety - n. fear or nervousness about what might happen