keystone
- n. 基础，根本，基本原则；（建筑）拱顶石，楔石；（生态）关键种（keystone species）
[ 复数 keystones ]
柯林斯英汉双解大词典
keystone /ˈkiːˌstəʊn/
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1.
N-COUNT A keystone of a policy, system, or process is an important part of it, which is the basis for later developments. 基础; 根本
例：The government's determination to beat inflation has so far been the keystone of its economic policy.
政府对通货膨胀的坚决抑制迄今为止一直是其经济政策的根本。
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2.
N-COUNT A keystone is a stone at the top of an arch, which keeps the other stones in place by its weight and position. 拱顶石 [技术]
双语例句原声例句权威例句
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That's what a keystone species does in an ecosystem.
那就是拱顶石物种在生态系统中的作用。
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The government's determination to beat inflation has so far been the keystone of its economic policy.
政府对通货膨胀的坚决抑制迄今为止一直是其经济政策的根本。
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Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.
VOA: special.2009.08.23
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The proposed Keystone XL pipeline would carry heavier crude oil produced from tar sands in Canada.
VOA: special.2011.07.08
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Pennsylvania's nickname is the Keystone State.
VOA: special.2009.08.23
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