intermittent fractionating

例句：

1. 1. The patient's condition improved intermittentlythroughout the day.
   病人的状况在一天中断断续续地有所改善。
2. 2. The rain was intermittently heavy and light.
   雨时而大雨时而小雨。
3. 3. The process of digestion is intermittently interrupted by meals.
   消化过程时断时续，被餐食打断。