| 单词 | cornerstone |
| 释义 | cornerstonecornerstone /ˈkɔrnɚˌstoʊn/ noun [countable] 1something that is extremely important because everything else depends on it: cornerstone of The magazine became the cornerstone of MacFadden’s publishing empire.2a stone set at one of the bottom corners of a building, often put in place at a special ceremony: The cornerstone was laid in 1848. |
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