| 词汇 | keystone |
| 释义 | keystoneUK:*/ˈkiːstəʊn/US:/ˈkiˌstoʊn/ ,(kē′stōn′)UK-RP:UK-Yorkshire:Irish:Scottish:US Southern:Australian:Jamaican: 主要翻译 keystone n (central stone of arch)拱心石；拱顶石；楔石The impact knocked the keystone loose and the whole arch collapsed. keystone n figurative (foundation) (比喻)基石，基础，要旨The critic discredited the keystone of the author's argument. |
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