Brit completely safe; reliable
a copper-bottomed currency
a copper-bottomed promise
[from the former practice of coating the bottoms of timber-frame ships with copper to prevent rotting]
| 单词 | copper-bottomed |
| 释义 | copper-bottomedadjBrit completely safe; reliable a copper-bottomed currency a copper-bottomed promise [from the former practice of coating the bottoms of timber-frame ships with copper to prevent rotting] |
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