单词	copper-bottomed
释义	copper-bottomedˌcopper-ˈbottomed adjective Examples EXAMPLES FROM THE CORPUS This was not only copper-bottomed security, it was a chance to play with the big numbers and see what happened. able to be depended on:  a copper-bottomed guarantee
随便看	urgency urgent urgently urgh Uriah Heep uric urinal urinary urinate urination urine Uris, Leon URL urn urological urologist urology Ursa Major Ursa Minor Uruguay Uruguayan US us USA usable

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