Rolls-Royce
noun [ C ] trademark uk/ˌrəʊlzˈrɔɪs/ us/ˌroʊlzˈrɔɪs/
（英国生产的大型昂贵豪华车）劳斯莱斯
a brand name for a large and very expensive type of car made in the UK
Idiom
the Rolls-Royce of somethingidiom mainly UK （同类中）最优良的产品，最佳者
the best type of a particular type of thing
This model is the Rolls-Royce of lawnmowers. 这款割草机是同类产品中最好的。