once in a while;occasionally;between times;every once in a while;now and then ;

He treated them seriously and, on occasion, entertained them hilariously.
他对待他们严肃认真,偶尔又逗得他们捧腹不已。
来源:《柯林斯高阶英汉双解学习词典》Occasionally a patient is so debilitated that he must be fed intravenously.
偶尔会有病人过于虚弱,必须通过静脉注射进食。
来源:《柯林斯高阶英汉双解学习词典》It would be excellent experience for him to travel a little.
对他来说,偶尔出去旅游会是很不错的经历。
来源:《柯林斯高阶英汉双解学习词典》The foggy streets were virtually empty, except for the occasional evening stroller.
除了偶尔一两个傍晚出来散步的人,雾蒙蒙的街上空荡荡的。
来源:《柯林斯高阶英汉双解学习词典》Nobody is perfect, and everyone acts thoughtlessly on occasion.
人无完人,谁都难保不偶尔疏忽一次。
来源:《柯林斯高阶英汉双解学习词典》Men were standing around, swilling beer and occasionally leering at passing females.
男人们吊儿郎当地站着,大口大口地喝着啤酒,偶尔还对着路过的女性猥亵地笑。
来源:《柯林斯高阶英汉双解学习词典》Now and again he'd join in when we were playing video games.
我们玩电子游戏时,他偶尔会和我们一起玩。
来源:《柯林斯高阶英汉双解学习词典》
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