| 单词 | keystone |
| 释义 | keystone 1 ENTRIES FOUND: plural keystones plural keystones Learner's definition of KEYSTONE [count] 1 : a large stone at the top of an arch that locks the other stones in place拱顶石;冠石 2 : something on which other things depend for support基础;主旨;基本原则
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英汉双解词典包含109353条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。