a one-time event is still not a sign of any serious change

listen to the pronunciation of a one-time event is still not a sign of any serious change
Английский Язык - Английский Язык

Определение a one-time event is still not a sign of any serious change в Английский Язык Английский Язык словарь

a one-time event is still not a sign of any serious change
one swallow doesn't make a summer