Related topics: Letters & punctuation
ABC /ˌeɪ biː ˈsiː/ noun 1. [singular] British EnglishBrE, ABCs [plural] American EnglishAmESLA the letters of the English alphabet as taught to children 〔教给儿童的〕英语字母（表）
2 the ABC of something British EnglishBrE, the ABCs of something American EnglishTRUE the basic facts about a particular subject 某学科的基本知识 the ABCs of your computer 你所掌握的计算机入门知识
3. (the American Broadcasting Company) one of the national television companies in the US 美国广播公司
4. (the Australian Broadcasting Corporation) the national public television company of Australia 澳大利亚广播公司