heater intermittent test

例句：

1. 1. The patient's condition improved intermittently over the next few days.
   病人在接下来的几天里断断续续地有所好转。
2. 2. The project was interrupted by a sudden rainstorm.
   这个项目被一场突如其来的暴雨打断了。
3. 3. The conversation was intermittently filled with laughter and tears.
   对话中不时充满了笑声和泪水。