2014年9月,“美国橄榄球联盟承认,预计全体球员中有三分之一会面临健康问题,比如由球场上遭受的脑震荡而导致的老年痴呆症。”

This September 2014, ‘the NFL admitted that it expects almost a third of all players to suffer from health problems, such as dementia, from concussions suffered on the field.’

– 经济学人/The Economist