classified

名词 classified:

1. a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
   同义词：classified ad, classified advertisement

动词 classify:

1. arrange or order by classes or categories
   同义词：classify, class, sort, assort, sort out, separate
2. declare unavailable, as for security reasons
   同义词：classify
3. assign to a class or kind
   同义词：relegate, classify

形容词 classified:

1. arranged into classes
2. official classification of information or documents; withheld from general circulation

1. A book containing an alphabetical or classified listing of names, addresses, and other data, such as telephone numbers, of specific persons, groups, or firms.
   通讯录，工商行名录，号码簿内含按字母顺序排列分类的人名、地址和其他资料的书，如特定的人、团体或公司的电话号码
2. The books in the library are classified by/according to subject.
   图书馆的书是按照[根据]科目分类的。
3. I'm looking for the classified section. Have you seen it?
   我正在找分类广告栏，你见到了吗？
4. The books in the library are classified by subject.
   图书馆的书是按科目分类的。