who says A, must say B
who
hu:
hoo
says
seɪz
seiz
A,
ei
must
mʌst
mast
say
seɪ
sei
B
bi:
bi

تعریف و معنی "who says A, must say B"در زبان انگلیسی

who says a, must say b
01

دست به مهره حرکته, شروع کردی باید تمامش کنی

used to suggest that if someone starts or initiates a particular action or process, it is expected that they will continue and complete the subsequent steps 
ضرب‌المثل
مثال‌ها
If you promise to do something, you must follow through with it. As the saying goes, who says A, must say B. 
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