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	bur Burberry burble burbs Burchill, Julie burden burdensome bureau bureaucracy bureaucrat bureaucratic bureaucratically bureau de change Bureau of Indian Affairs burette burgeon burger Burger King Burgess, Anthony Burgess, Guy burgh burgher burglar burglar alarm burglarize

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