low frequency fluctuation

例句：

1. 1. The device generates low frequency fluctuations that can affect the accuracy of measurements.
   该设备产生的低频波动会影响测量的准确性。
2. 2. In the study, we observed low frequency fluctuations in the temperature data.
   在研究中，我们观察到温度数据中的低频波动。
3. 3. The scientist noticed a low frequency fluctuation in the electrical signal.
   科学家注意到了电信号中的低频波动。