a shop that sells food, etc. in a military base, a prison, etc. （军事基地、监狱等处出售食品等的）杂货商店 a restaurant for people working in a large organization, especially a film studio （大型机构，尤指电影制片厂的）员工餐厅
Word Originlate Middle English: from medieval Latin commissarius ‘person in charge’, from Latin commiss- ‘joined, entrusted’, from the verb committere (in medieval Latin ‘put into custody’), from com- ‘with’ + mittere ‘put or send’.