transcription, транскрипция: [ eɪ bi: si: ]
( ABCs)
1.
The ABC of a subject or activity is the parts of it that you have to learn first because they are the most important and basic.
...the ABC of Marxism.
N-SING : N of n
2.
Children who have learned their ABC or their ABCs have learned to recognize, write, or say the alphabet. ( INFORMAL )
N-COUNT : poss N