1、once in a while的意思是：偶尔；有时（等于 every once in a while）。2、once in a while的英英释义是Adverb:now and then or here and there;"he was arrogant and occasionally callous""open areas are only occasionally interrupted by clumps of trees""they visit New York on occasion""now and again she would take her favorite book from the shelf and read to us""as we drove along, the beautiful scenery now and then attracted his attention"。3、once in a while的例句是We heard the occasional rumble of a passing truck.我们偶尔听到卡车驶过的隆隆声。