题目内容：

work done 是什么意思? 下面为单词 service 英语解释.
1ser·vice/ˈsəvəs/noun
plural ser·vic·es
1[count] : an organization, company, or system that provides something to the public▪ the National Park Service
2:work done by an organization or person that does not involve producing goods [count] ▪ Take advantage of their free delivery service. ▪ bus/Internet/telephone service
3[noncount] a : work done for a business or organization : employment▪ She retired from the company after 34 years of service.