keystone

From Longman Dictionary of Contemporary EnglishRelated topics: Constructionkeystonekey‧stone /ˈkiːstəʊn $ -stoʊn/ noun 1 TBC[countable] the large central stone in an arch that keeps the other stones in position2 IMPORTANT[singular] formal the most important part of an idea, belief, or process that influences how it developskeystone of The keystone of any personal injury case is medical evidence.Examples from the Corpuskeystone of• A high level of production has become a keystone of economic security.

单词	keystone
释义	keystone From Longman Dictionary of Contemporary EnglishRelated topics: Constructionkeystonekey‧stone /ˈkiːstəʊn $ -stoʊn/ noun 1 TBC[countable] the large central stone in an arch that keeps the other stones in position2 IMPORTANT[singular] formal the most important part of an idea, belief, or process that influences how it developskeystone of The keystone of any personal injury case is medical evidence.Examples from the Corpuskeystone of• A high level of production has become a keystone of economic security.
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