[TOP]grey matter 'grey matter (especially BrE) (NAmE usually 'gray matter) noun [U] (informal) a person's intelligence (人的)头脑,脑子 [TOP]grey matter 'grey ˌmatter noun [U] [BrE] ; gray matter [AmE] [informal] 1. your intelligence, or your brain 智力; 头脑，脑子 [TOP]grey matter noun uncountable informal » a person's intelligence 头脑；脑子；智力 It's not the sort of movie that stimulates the old grey matter much. 这出电影并不发人深思。 [TOP]grey matter
in AM, use 美国英语用 gray matter
1.N-UNCOUNT 不可数名词 头脑；智力 You can refer to your intelligence or your brains as grey matter .
【STYLE标签】：INFORMAL 非正式
...an unsolved mathematical equation which has caused his grey matter to work overtime. 他长时间思考的一道悬而未决的数学方程式