service 在表达“服务”意思时有两种概念:“服务”这件事(工作性质、区别于其他商务活动等)用不可数,而“服务”内容或类型则可数:不可数:He has done service for us as a consultant.civil servicebus service可数:He offers a superior service to that of his competitors; provides full catering services.International student servicesPublic services