repetitive signal

例句：

1. 1. The patient's symptoms are repetitive and intermittent.
   患者的病症是反复无常的。
2. 2.The teacher repeated the instructions several times to ensure understanding.
   老师多次重复指令以确保理解。
3. 3.The researcher found that the data was repetitive across different experiments.
   研究者发现数据在不同实验中都是重复的。