VOA慢速英语:研究引发职业足球对痴呆症的新关注

dementia – n. a term for diseases and conditions characterized by a loss of memory, language, problem-solving and other thinking skills. Alzheimer's is the most common cause of dementia.

focus – v. to direct your attention or effort at something specific

benefits – n. good or helpful results or effects

participation – n. the act of joining with others in doing something

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