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新东方-柯林斯雅思备考词典
cornerstone
英 [ˈkɔːnəstəʊn]
[NOUN]
cornerstones
1. [C 可数名词] 基石
The cornerstone of something is the basic part of it on which its existence, success, or truth depends.
近义词
keystone
双语例句
例：Research is the cornerstone of the profession.
研究是该职业的基石。