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单词 keystone
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释义  Related topics: Constructionkey·stone /ˈkiːstəʊn $ -stoʊn/ noun  1. TBC[countable] the large central stone in an arch that keeps the other stones in position 拱顶石2  IMPORTANT[singular] formal the most important part of an idea, belief, or process that influences how it develops 〔观点、信仰、进程等的〕基础，主旨，基石keystone of The keystone of any personal injury case is medical evidence. 裁定人身伤害案的基础是医学证据。Examples from the Corpuskeystone of• A high level of production has become a keystone of economic security.key·stone nounChineseSyllable  the an central large in arch that keeps Corpus stone
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更新时间：2026/10/2 7:50:18