释义 |
key·stoneBrE /ˈkiːstəʊn/NAmE /ˈkiːstoʊn/ noun(architecture 建筑) the central stone at the top of an arch that keeps all the other stones in position 拱顶石 [usually sing.] the most important part of a plan or argument that the other parts depend on (计划、论据的)主旨,基础 |