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BNC: 21380 COCA: 17516

keystone

Word family 
Related topics: Construction
key·stone /ˈkiːstəʊn $ -stoʊn/ noun  
1. TBC[countableC] 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 Corpus
keystone of• A high level of production has become a keystone of economic security.
key·stone noun
Chinese
Syllable
Corpus
BNC: 21380 COCA: 17516
BNC: 21380 COCA: 17516
BNC: 21380 COCA: 17516
keystone
Important thing or detail: feature, priority, element...
Frames and supports for structures: frame, foundation, support...

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