ext.

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++

Related topics: Telephone, telegraph

ext.TCTthe written abbreviation of extension when you mean a particular telephone line / extension 的书面缩写，(电话)分机

ext.Chinese  

ext.
ext.
the written abbreviation of extension when you mean a particular telephone line

ext. abbreviation(used as part of a telephone number) extension （用于电话号码）电话分机线，分机号码◆Ext. 4299分机号码 4299