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单词 keystone
释义

keystone

1 ENTRIES FOUND:
keystone /ˈkiːˌstoʊn/ noun
plural keystones
keystone
/ˈkiːˌstoʊn/
noun
plural keystones
Learner's definition of KEYSTONE
[count]
: a large stone at the top of an arch that locks the other stones in place拱顶石;冠石
: something on which other things depend for support基础;主旨;基本原则
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更新时间:2025/2/10 7:39:10