unbound book
美
[ʌnˈbaʊnd bʊk]
英
[ˌʌnˈbaund buk]
[经] 不装订的帐簿,活页帐
Examples
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美[ʌnˈbaʊnd bʊk]英[ˌʌnˈbaund buk]
[经] 不装订的帐簿,活页帐