By using the devised predictor and updater for second geueration wavelet transform composition, threshold processing and reconstruction, the datatrend can be obtained.
采用设计预测器和更新器对监测数据分解、阈值处理和重构，得到监测数据的趋势。
2
You need a long series of data to be able to discern such a trend.
你需要一大串数据才能认清这一趋势。
《柯林斯英汉双解大词典》
3
The data is exact enough, for a clear trend to be easily discernible.