long-term frequency drift

例句：

1. 1.The satellite's orbital parameters have undergone a long-term frequency drift since its launch.
   自从卫星发射以来，它的轨道参数经历了长期的频率漂移。
2. 2. The data collected over the past year has shown a clear long-term frequency drift in the population growth rate.
   过去一年收集的数据清楚地显示了人口增长率的长期频率漂移。
3. 3. The researchers found that the long-term frequency drift in the ocean currents was due to changes in the wind patterns.
   研究人员发现海洋洋流的长期频率漂移是由于风向模式的变化造成的。