intermittently rainy climate

例句：

1. 1.The rain was intermittently heavy and light.
   雨时而大雨时而小雨。
2. 2.The patient's condition improved intermittently throughout the day.
   病人的状况在一天中时好时坏。
3. 3. The workload was intermittently heavy and light.
   工作量时而繁重时而轻松。