| 释义 |
seasonal affective disorderBrE /ˌsiːzənl əˈfektɪv dɪsɔːdə(r)/NAmE /ˌsiːzənl əˈfektɪv dɪsɔːrdər/ noun [U] (abbreviation SAD) a medical condition in which a person feels sad and tired during late autumn/fall and winter when there is not much light from the sun 季节性情感障碍（秋冬两季因白昼缩短而易发作的抑郁症） |