资料来源 : WordNet®

unacquainted with
     adj 1: not knowledgeable about something specified; "American
            tourists wholly innocent of French"; "a person
            unacquainted with our customs" [syn: {innocent of(p)},
             {unacquainted with(p)}]
     2: having little or no knowledge of; "unacquainted with city
        ways" [syn: {unacquainted(p)}, {unacquainted with(p)}, {unfamiliar
        with(p)}]