一两次
Definition:
AllAll,once or twiceonce or twice,One or two timesOne or two times,twice a few timestwice a few times,RealizeRealize
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Once or twice a year I teach a case study about PizzaExpress (a restaurant chain I used to run) at London Business School.
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After 400 hrs on the first bulb it began to flicker (liked dimmed once or twice a second) and I got a free replacement bulb from SONY.