Р-33

РАЗ НА РАЗ HE ПРИХОДИТСЯ coll (sent pres only fixed WO

things, conditions etc do not repeat themselves, they are different every time

it's never the same twice

things are not always the same (when comparing a less successful attempt, outcome etc with a more successful one) it can't be perfect every time.

«Тут всегда такая хорошая рыбалка?» - «Ну, раз на раз не приходится». "Is the fishing here always this good?" "Well, it's never the same twice."

«Осудят его?» - спросил Костенко. «Какой судья попадется, - сказал Садчиков. - Раз на раз не приходится» (Семенов 1). "Will he be convicted?" asked Kostyenko. "It depends on which judge he gets," said Sadchikov "Things are not always the same" (1a).